diff --git a/public/js/lib/dagre/dagre.js b/public/js/lib/dagre/dagre.js
new file mode 100644
index 0000000..b62dde6
--- /dev/null
+++ b/public/js/lib/dagre/dagre.js
@@ -0,0 +1,10825 @@
+!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.dagre=e()}}(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
+/*
+Copyright (c) 2012-2014 Chris Pettitt
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+module.exports = {
+  graphlib: require("./lib/graphlib"),
+
+  layout: require("./lib/layout"),
+  debug: require("./lib/debug"),
+  util: {
+    time: require("./lib/util").time,
+    notime: require("./lib/util").notime
+  },
+  version: require("./lib/version")
+};
+
+},{"./lib/debug":6,"./lib/graphlib":7,"./lib/layout":9,"./lib/util":29,"./lib/version":30}],2:[function(require,module,exports){
+"use strict";
+
+var _ = require("./lodash"),
+    greedyFAS = require("./greedy-fas");
+
+module.exports = {
+  run: run,
+  undo: undo
+};
+
+function run(g) {
+  var fas = (g.graph().acyclicer === "greedy"
+                ? greedyFAS(g, weightFn(g))
+                : dfsFAS(g));
+  _.each(fas, function(e) {
+    var label = g.edge(e);
+    g.removeEdge(e);
+    label.forwardName = e.name;
+    label.reversed = true;
+    g.setEdge(e.w, e.v, label, _.uniqueId("rev"));
+  });
+
+  function weightFn(g) {
+    return function(e) {
+      return g.edge(e).weight;
+    };
+  }
+}
+
+function dfsFAS(g) {
+  var fas = [],
+      stack = {},
+      visited = {};
+
+  function dfs(v) {
+    if (_.has(visited, v)) {
+      return;
+    }
+    visited[v] = true;
+    stack[v] = true;
+    _.each(g.outEdges(v), function(e) {
+      if (_.has(stack, e.w)) {
+        fas.push(e);
+      } else {
+        dfs(e.w);
+      }
+    });
+    delete stack[v];
+  }
+
+  _.each(g.nodes(), dfs);
+  return fas;
+}
+
+function undo(g) {
+  _.each(g.edges(), function(e) {
+    var label = g.edge(e);
+    if (label.reversed) {
+      g.removeEdge(e);
+
+      var forwardName = label.forwardName;
+      delete label.reversed;
+      delete label.forwardName;
+      g.setEdge(e.w, e.v, label, forwardName);
+    }
+  });
+}
+
+},{"./greedy-fas":8,"./lodash":10}],3:[function(require,module,exports){
+var _ = require("./lodash"),
+    util = require("./util");
+
+module.exports = addBorderSegments;
+
+function addBorderSegments(g) {
+  function dfs(v) {
+    var children = g.children(v),
+        node = g.node(v);
+    if (children.length) {
+      _.each(children, dfs);
+    }
+
+    if (_.has(node, "minRank")) {
+      node.borderLeft = [];
+      node.borderRight = [];
+      for (var rank = node.minRank, maxRank = node.maxRank + 1;
+           rank < maxRank;
+           ++rank) {
+        addBorderNode(g, "borderLeft", "_bl", v, node, rank);
+        addBorderNode(g, "borderRight", "_br", v, node, rank);
+      }
+    }
+  }
+
+  _.each(g.children(), dfs);
+}
+
+function addBorderNode(g, prop, prefix, sg, sgNode, rank) {
+  var label = { width: 0, height: 0, rank: rank },
+      prev = sgNode[prop][rank - 1],
+      curr = util.addDummyNode(g, "border", label, prefix);
+  sgNode[prop][rank] = curr;
+  g.setParent(curr, sg);
+  if (prev) {
+    g.setEdge(prev, curr, { weight: 1 });
+  }
+}
+
+},{"./lodash":10,"./util":29}],4:[function(require,module,exports){
+"use strict";
+
+var _ = require("./lodash");
+
+module.exports = {
+  adjust: adjust,
+  undo: undo
+};
+
+function adjust(g) {
+  var rankDir = g.graph().rankdir.toLowerCase();
+  if (rankDir === "lr" || rankDir === "rl") {
+    swapWidthHeight(g);
+  }
+}
+
+function undo(g) {
+  var rankDir = g.graph().rankdir.toLowerCase();
+  if (rankDir === "bt" || rankDir === "rl") {
+    reverseY(g);
+  }
+
+  if (rankDir === "lr" || rankDir === "rl") {
+    swapXY(g);
+    swapWidthHeight(g);
+  }
+}
+
+function swapWidthHeight(g) {
+  _.each(g.nodes(), function(v) { swapWidthHeightOne(g.node(v)); });
+  _.each(g.edges(), function(e) { swapWidthHeightOne(g.edge(e)); });
+}
+
+function swapWidthHeightOne(attrs) {
+  var w = attrs.width;
+  attrs.width = attrs.height;
+  attrs.height = w;
+}
+
+function reverseY(g) {
+  _.each(g.nodes(), function(v) { reverseYOne(g.node(v)); });
+
+  _.each(g.edges(), function(e) {
+    var edge = g.edge(e);
+    _.each(edge.points, reverseYOne);
+    if (_.has(edge, "y")) {
+      reverseYOne(edge);
+    }
+  });
+}
+
+function reverseYOne(attrs) {
+  attrs.y = -attrs.y;
+}
+
+function swapXY(g) {
+  _.each(g.nodes(), function(v) { swapXYOne(g.node(v)); });
+
+  _.each(g.edges(), function(e) {
+    var edge = g.edge(e);
+    _.each(edge.points, swapXYOne);
+    if (_.has(edge, "x")) {
+      swapXYOne(edge);
+    }
+  });
+}
+
+function swapXYOne(attrs) {
+  var x = attrs.x;
+  attrs.x = attrs.y;
+  attrs.y = x;
+}
+
+},{"./lodash":10}],5:[function(require,module,exports){
+/*
+ * Simple doubly linked list implementation derived from Cormen, et al.,
+ * "Introduction to Algorithms".
+ */
+
+module.exports = List;
+
+function List() {
+  var sentinel = {};
+  sentinel._next = sentinel._prev = sentinel;
+  this._sentinel = sentinel;
+}
+
+List.prototype.dequeue = function() {
+  var sentinel = this._sentinel,
+      entry = sentinel._prev;
+  if (entry !== sentinel) {
+    unlink(entry);
+    return entry;
+  }
+};
+
+List.prototype.enqueue = function(entry) {
+  var sentinel = this._sentinel;
+  if (entry._prev && entry._next) {
+    unlink(entry);
+  }
+  entry._next = sentinel._next;
+  sentinel._next._prev = entry;
+  sentinel._next = entry;
+  entry._prev = sentinel;
+};
+
+List.prototype.toString = function() {
+  var strs = [],
+      sentinel = this._sentinel,
+      curr = sentinel._prev;
+  while (curr !== sentinel) {
+    strs.push(JSON.stringify(curr, filterOutLinks));
+    curr = curr._prev;
+  }
+  return "[" + strs.join(", ") + "]";
+};
+
+function unlink(entry) {
+  entry._prev._next = entry._next;
+  entry._next._prev = entry._prev;
+  delete entry._next;
+  delete entry._prev;
+}
+
+function filterOutLinks(k, v) {
+  if (k !== "_next" && k !== "_prev") {
+    return v;
+  }
+}
+
+},{}],6:[function(require,module,exports){
+var _ = require("./lodash"),
+    util = require("./util"),
+    Graph = require("./graphlib").Graph;
+
+module.exports = {
+  debugOrdering: debugOrdering
+};
+
+/* istanbul ignore next */
+function debugOrdering(g) {
+  var layerMatrix = util.buildLayerMatrix(g);
+
+  var h = new Graph({ compound: true, multigraph: true }).setGraph({});
+
+  _.each(g.nodes(), function(v) {
+    h.setNode(v, { label: v });
+    h.setParent(v, "layer" + g.node(v).rank);
+  });
+
+  _.each(g.edges(), function(e) {
+    h.setEdge(e.v, e.w, {}, e.name);
+  });
+
+  _.each(layerMatrix, function(layer, i) {
+    var layerV = "layer" + i;
+    h.setNode(layerV, { rank: "same" });
+    _.reduce(layer, function(u, v) {
+      h.setEdge(u, v, { style: "invis" });
+      return v;
+    });
+  });
+
+  return h;
+}
+
+},{"./graphlib":7,"./lodash":10,"./util":29}],7:[function(require,module,exports){
+/* global window */
+
+var graphlib;
+
+if (require) {
+  try {
+    graphlib = require("graphlib");
+  } catch (e) {}
+}
+
+if (!graphlib) {
+  graphlib = window.graphlib;
+}
+
+module.exports = graphlib;
+
+},{"graphlib":31}],8:[function(require,module,exports){
+var _ = require("./lodash"),
+    Graph = require("./graphlib").Graph,
+    List = require("./data/list");
+
+/*
+ * A greedy heuristic for finding a feedback arc set for a graph. A feedback
+ * arc set is a set of edges that can be removed to make a graph acyclic.
+ * The algorithm comes from: P. Eades, X. Lin, and W. F. Smyth, "A fast and
+ * effective heuristic for the feedback arc set problem." This implementation
+ * adjusts that from the paper to allow for weighted edges.
+ */
+module.exports = greedyFAS;
+
+var DEFAULT_WEIGHT_FN = _.constant(1);
+
+function greedyFAS(g, weightFn) {
+  if (g.nodeCount() <= 1) {
+    return [];
+  }
+  var state = buildState(g, weightFn || DEFAULT_WEIGHT_FN);
+  var results = doGreedyFAS(state.graph, state.buckets, state.zeroIdx);
+
+  // Expand multi-edges
+  return _.flatten(_.map(results, function(e) {
+    return g.outEdges(e.v, e.w);
+  }), true);
+}
+
+function doGreedyFAS(g, buckets, zeroIdx) {
+  var results = [],
+      sources = buckets[buckets.length - 1],
+      sinks = buckets[0];
+
+  var entry;
+  while (g.nodeCount()) {
+    while ((entry = sinks.dequeue()))   { removeNode(g, buckets, zeroIdx, entry); }
+    while ((entry = sources.dequeue())) { removeNode(g, buckets, zeroIdx, entry); }
+    if (g.nodeCount()) {
+      for (var i = buckets.length - 2; i > 0; --i) {
+        entry = buckets[i].dequeue();
+        if (entry) {
+          results = results.concat(removeNode(g, buckets, zeroIdx, entry, true));
+          break;
+        }
+      }
+    }
+  }
+
+  return results;
+}
+
+function removeNode(g, buckets, zeroIdx, entry, collectPredecessors) {
+  var results = collectPredecessors ? [] : undefined;
+
+  _.each(g.inEdges(entry.v), function(edge) {
+    var weight = g.edge(edge),
+        uEntry = g.node(edge.v);
+
+    if (collectPredecessors) {
+      results.push({ v: edge.v, w: edge.w });
+    }
+
+    uEntry.out -= weight;
+    assignBucket(buckets, zeroIdx, uEntry);
+  });
+
+  _.each(g.outEdges(entry.v), function(edge) {
+    var weight = g.edge(edge),
+        w = edge.w,
+        wEntry = g.node(w);
+    wEntry["in"] -= weight;
+    assignBucket(buckets, zeroIdx, wEntry);
+  });
+
+  g.removeNode(entry.v);
+
+  return results;
+}
+
+function buildState(g, weightFn) {
+  var fasGraph = new Graph(),
+      maxIn = 0,
+      maxOut = 0;
+
+  _.each(g.nodes(), function(v) {
+    fasGraph.setNode(v, { v: v, "in": 0, out: 0 });
+  });
+
+  // Aggregate weights on nodes, but also sum the weights across multi-edges
+  // into a single edge for the fasGraph.
+  _.each(g.edges(), function(e) {
+    var prevWeight = fasGraph.edge(e.v, e.w) || 0,
+        weight = weightFn(e),
+        edgeWeight = prevWeight + weight;
+    fasGraph.setEdge(e.v, e.w, edgeWeight);
+    maxOut = Math.max(maxOut, fasGraph.node(e.v).out += weight);
+    maxIn  = Math.max(maxIn,  fasGraph.node(e.w)["in"]  += weight);
+  });
+
+  var buckets = _.range(maxOut + maxIn + 3).map(function() { return new List(); });
+  var zeroIdx = maxIn + 1;
+
+  _.each(fasGraph.nodes(), function(v) {
+    assignBucket(buckets, zeroIdx, fasGraph.node(v));
+  });
+
+  return { graph: fasGraph, buckets: buckets, zeroIdx: zeroIdx };
+}
+
+function assignBucket(buckets, zeroIdx, entry) {
+  if (!entry.out) {
+    buckets[0].enqueue(entry);
+  } else if (!entry["in"]) {
+    buckets[buckets.length - 1].enqueue(entry);
+  } else {
+    buckets[entry.out - entry["in"] + zeroIdx].enqueue(entry);
+  }
+}
+
+},{"./data/list":5,"./graphlib":7,"./lodash":10}],9:[function(require,module,exports){
+"use strict";
+
+var _ = require("./lodash"),
+    acyclic = require("./acyclic"),
+    normalize = require("./normalize"),
+    rank = require("./rank"),
+    normalizeRanks = require("./util").normalizeRanks,
+    parentDummyChains = require("./parent-dummy-chains"),
+    removeEmptyRanks = require("./util").removeEmptyRanks,
+    nestingGraph = require("./nesting-graph"),
+    addBorderSegments = require("./add-border-segments"),
+    coordinateSystem = require("./coordinate-system"),
+    order = require("./order"),
+    position = require("./position"),
+    util = require("./util"),
+    Graph = require("./graphlib").Graph;
+
+module.exports = layout;
+
+function layout(g, opts) {
+  var time = opts && opts.debugTiming ? util.time : util.notime;
+  time("layout", function() {
+    var layoutGraph = time("  buildLayoutGraph",
+                               function() { return buildLayoutGraph(g); });
+    time("  runLayout",        function() { runLayout(layoutGraph, time); });
+    time("  updateInputGraph", function() { updateInputGraph(g, layoutGraph); });
+  });
+}
+
+function runLayout(g, time) {
+  time("    makeSpaceForEdgeLabels", function() { makeSpaceForEdgeLabels(g); });
+  time("    removeSelfEdges",        function() { removeSelfEdges(g); });
+  time("    acyclic",                function() { acyclic.run(g); });
+  time("    nestingGraph.run",       function() { nestingGraph.run(g); });
+  time("    rank",                   function() { rank(util.asNonCompoundGraph(g)); });
+  time("    injectEdgeLabelProxies", function() { injectEdgeLabelProxies(g); });
+  time("    removeEmptyRanks",       function() { removeEmptyRanks(g); });
+  time("    nestingGraph.cleanup",   function() { nestingGraph.cleanup(g); });
+  time("    normalizeRanks",         function() { normalizeRanks(g); });
+  time("    assignRankMinMax",       function() { assignRankMinMax(g); });
+  time("    removeEdgeLabelProxies", function() { removeEdgeLabelProxies(g); });
+  time("    normalize.run",          function() { normalize.run(g); });
+  time("    parentDummyChains",      function() { parentDummyChains(g); });
+  time("    addBorderSegments",      function() { addBorderSegments(g); });
+  time("    order",                  function() { order(g); });
+  time("    insertSelfEdges",        function() { insertSelfEdges(g); });
+  time("    adjustCoordinateSystem", function() { coordinateSystem.adjust(g); });
+  time("    position",               function() { position(g); });
+  time("    positionSelfEdges",      function() { positionSelfEdges(g); });
+  time("    removeBorderNodes",      function() { removeBorderNodes(g); });
+  time("    normalize.undo",         function() { normalize.undo(g); });
+  time("    fixupEdgeLabelCoords",   function() { fixupEdgeLabelCoords(g); });
+  time("    undoCoordinateSystem",   function() { coordinateSystem.undo(g); });
+  time("    translateGraph",         function() { translateGraph(g); });
+  time("    assignNodeIntersects",   function() { assignNodeIntersects(g); });
+  time("    reversePoints",          function() { reversePointsForReversedEdges(g); });
+  time("    acyclic.undo",           function() { acyclic.undo(g); });
+}
+
+/*
+ * Copies final layout information from the layout graph back to the input
+ * graph. This process only copies whitelisted attributes from the layout graph
+ * to the input graph, so it serves as a good place to determine what
+ * attributes can influence layout.
+ */
+function updateInputGraph(inputGraph, layoutGraph) {
+  _.each(inputGraph.nodes(), function(v) {
+    var inputLabel = inputGraph.node(v),
+        layoutLabel = layoutGraph.node(v);
+
+    if (inputLabel) {
+      inputLabel.x = layoutLabel.x;
+      inputLabel.y = layoutLabel.y;
+
+      if (layoutGraph.children(v).length) {
+        inputLabel.width = layoutLabel.width;
+        inputLabel.height = layoutLabel.height;
+      }
+    }
+  });
+
+  _.each(inputGraph.edges(), function(e) {
+    var inputLabel = inputGraph.edge(e),
+        layoutLabel = layoutGraph.edge(e);
+
+    inputLabel.points = layoutLabel.points;
+    if (_.has(layoutLabel, "x")) {
+      inputLabel.x = layoutLabel.x;
+      inputLabel.y = layoutLabel.y;
+    }
+  });
+
+  inputGraph.graph().width = layoutGraph.graph().width;
+  inputGraph.graph().height = layoutGraph.graph().height;
+}
+
+var graphNumAttrs = ["nodesep", "edgesep", "ranksep", "marginx", "marginy"],
+    graphDefaults = { ranksep: 50, edgesep: 20, nodesep: 50, rankdir: "tb" },
+    graphAttrs = ["acyclicer", "ranker", "rankdir", "align"],
+    nodeNumAttrs = ["width", "height"],
+    nodeDefaults = { width: 0, height: 0 },
+    edgeNumAttrs = ["minlen", "weight", "width", "height", "labeloffset"],
+    edgeDefaults = {
+      minlen: 1, weight: 1, width: 0, height: 0,
+      labeloffset: 10, labelpos: "r"
+    },
+    edgeAttrs = ["labelpos"];
+
+/*
+ * Constructs a new graph from the input graph, which can be used for layout.
+ * This process copies only whitelisted attributes from the input graph to the
+ * layout graph. Thus this function serves as a good place to determine what
+ * attributes can influence layout.
+ */
+function buildLayoutGraph(inputGraph) {
+  var g = new Graph({ multigraph: true, compound: true }),
+      graph = canonicalize(inputGraph.graph());
+
+  g.setGraph(_.merge({},
+    graphDefaults,
+    selectNumberAttrs(graph, graphNumAttrs),
+    _.pick(graph, graphAttrs)));
+
+  _.each(inputGraph.nodes(), function(v) {
+    var node = canonicalize(inputGraph.node(v));
+    g.setNode(v, _.defaults(selectNumberAttrs(node, nodeNumAttrs), nodeDefaults));
+    g.setParent(v, inputGraph.parent(v));
+  });
+
+  _.each(inputGraph.edges(), function(e) {
+    var edge = canonicalize(inputGraph.edge(e));
+    g.setEdge(e, _.merge({},
+      edgeDefaults,
+      selectNumberAttrs(edge, edgeNumAttrs),
+      _.pick(edge, edgeAttrs)));
+  });
+
+  return g;
+}
+
+/*
+ * This idea comes from the Gansner paper: to account for edge labels in our
+ * layout we split each rank in half by doubling minlen and halving ranksep.
+ * Then we can place labels at these mid-points between nodes.
+ *
+ * We also add some minimal padding to the width to push the label for the edge
+ * away from the edge itself a bit.
+ */
+function makeSpaceForEdgeLabels(g) {
+  var graph = g.graph();
+  graph.ranksep /= 2;
+  _.each(g.edges(), function(e) {
+    var edge = g.edge(e);
+    edge.minlen *= 2;
+    if (edge.labelpos.toLowerCase() !== "c") {
+      if (graph.rankdir === "TB" || graph.rankdir === "BT") {
+        edge.width += edge.labeloffset;
+      } else {
+        edge.height += edge.labeloffset;
+      }
+    }
+  });
+}
+
+/*
+ * Creates temporary dummy nodes that capture the rank in which each edge's
+ * label is going to, if it has one of non-zero width and height. We do this
+ * so that we can safely remove empty ranks while preserving balance for the
+ * label's position.
+ */
+function injectEdgeLabelProxies(g) {
+  _.each(g.edges(), function(e) {
+    var edge = g.edge(e);
+    if (edge.width && edge.height) {
+      var v = g.node(e.v),
+          w = g.node(e.w),
+          label = { rank: (w.rank - v.rank) / 2 + v.rank, e: e };
+      util.addDummyNode(g, "edge-proxy", label, "_ep");
+    }
+  });
+}
+
+function assignRankMinMax(g) {
+  var maxRank = 0;
+  _.each(g.nodes(), function(v) {
+    var node = g.node(v);
+    if (node.borderTop) {
+      node.minRank = g.node(node.borderTop).rank;
+      node.maxRank = g.node(node.borderBottom).rank;
+      maxRank = _.max(maxRank, node.maxRank);
+    }
+  });
+  g.graph().maxRank = maxRank;
+}
+
+function removeEdgeLabelProxies(g) {
+  _.each(g.nodes(), function(v) {
+    var node = g.node(v);
+    if (node.dummy === "edge-proxy") {
+      g.edge(node.e).labelRank = node.rank;
+      g.removeNode(v);
+    }
+  });
+}
+
+function translateGraph(g) {
+  var minX = Number.POSITIVE_INFINITY,
+      maxX = 0,
+      minY = Number.POSITIVE_INFINITY,
+      maxY = 0,
+      graphLabel = g.graph(),
+      marginX = graphLabel.marginx || 0,
+      marginY = graphLabel.marginy || 0;
+
+  function getExtremes(attrs) {
+    var x = attrs.x,
+        y = attrs.y,
+        w = attrs.width,
+        h = attrs.height;
+    minX = Math.min(minX, x - w / 2);
+    maxX = Math.max(maxX, x + w / 2);
+    minY = Math.min(minY, y - h / 2);
+    maxY = Math.max(maxY, y + h / 2);
+  }
+
+  _.each(g.nodes(), function(v) { getExtremes(g.node(v)); });
+  _.each(g.edges(), function(e) {
+    var edge = g.edge(e);
+    if (_.has(edge, "x")) {
+      getExtremes(edge);
+    }
+  });
+
+  minX -= marginX;
+  minY -= marginY;
+
+  _.each(g.nodes(), function(v) {
+    var node = g.node(v);
+    node.x -= minX;
+    node.y -= minY;
+  });
+
+  _.each(g.edges(), function(e) {
+    var edge = g.edge(e);
+    _.each(edge.points, function(p) {
+      p.x -= minX;
+      p.y -= minY;
+    });
+    if (_.has(edge, "x")) { edge.x -= minX; }
+    if (_.has(edge, "y")) { edge.y -= minY; }
+  });
+
+  graphLabel.width = maxX - minX + marginX;
+  graphLabel.height = maxY - minY + marginY;
+}
+
+function assignNodeIntersects(g) {
+  _.each(g.edges(), function(e) {
+    var edge = g.edge(e),
+        nodeV = g.node(e.v),
+        nodeW = g.node(e.w),
+        p1, p2;
+    if (!edge.points) {
+      edge.points = [];
+      p1 = nodeW;
+      p2 = nodeV;
+    } else {
+      p1 = edge.points[0];
+      p2 = edge.points[edge.points.length - 1];
+    }
+    edge.points.unshift(util.intersectRect(nodeV, p1));
+    edge.points.push(util.intersectRect(nodeW, p2));
+  });
+}
+
+function fixupEdgeLabelCoords(g) {
+  _.each(g.edges(), function(e) {
+    var edge = g.edge(e);
+    if (_.has(edge, "x")) {
+      if (edge.labelpos === "l" || edge.labelpos === "r") {
+        edge.width -= edge.labeloffset;
+      }
+      switch (edge.labelpos) {
+        case "l": edge.x -= edge.width / 2 + edge.labeloffset; break;
+        case "r": edge.x += edge.width / 2 + edge.labeloffset; break;
+      }
+    }
+  });
+}
+
+function reversePointsForReversedEdges(g) {
+  _.each(g.edges(), function(e) {
+    var edge = g.edge(e);
+    if (edge.reversed) {
+      edge.points.reverse();
+    }
+  });
+}
+
+function removeBorderNodes(g) {
+  _.each(g.nodes(), function(v) {
+    if (g.children(v).length) {
+      var node = g.node(v),
+          t = g.node(node.borderTop),
+          b = g.node(node.borderBottom),
+          l = g.node(_.last(node.borderLeft)),
+          r = g.node(_.last(node.borderRight));
+
+      node.width = Math.abs(r.x - l.x);
+      node.height = Math.abs(b.y - t.y);
+      node.x = l.x + node.width / 2;
+      node.y = t.y + node.height / 2;
+    }
+  });
+
+  _.each(g.nodes(), function(v) {
+    if (g.node(v).dummy === "border") {
+      g.removeNode(v);
+    }
+  });
+}
+
+function removeSelfEdges(g) {
+  _.each(g.edges(), function(e) {
+    if (e.v === e.w) {
+      var node = g.node(e.v);
+      if (!node.selfEdges) {
+        node.selfEdges = [];
+      }
+      node.selfEdges.push({ e: e, label: g.edge(e) });
+      g.removeEdge(e);
+    }
+  });
+}
+
+function insertSelfEdges(g) {
+  var layers = util.buildLayerMatrix(g);
+  _.each(layers, function(layer) {
+    var orderShift = 0;
+    _.each(layer, function(v, i) {
+      var node = g.node(v);
+      node.order = i + orderShift;
+      _.each(node.selfEdges, function(selfEdge) {
+        util.addDummyNode(g, "selfedge", {
+          width: selfEdge.label.width,
+          height: selfEdge.label.height,
+          rank: node.rank,
+          order: i + (++orderShift),
+          e: selfEdge.e,
+          label: selfEdge.label
+        }, "_se");
+      });
+      delete node.selfEdges;
+    });
+  });
+}
+
+function positionSelfEdges(g) {
+  _.each(g.nodes(), function(v) {
+    var node = g.node(v);
+    if (node.dummy === "selfedge") {
+      var selfNode = g.node(node.e.v),
+          x = selfNode.x + selfNode.width / 2,
+          y = selfNode.y,
+          dx = node.x - x,
+          dy = selfNode.height / 2;
+      g.setEdge(node.e, node.label);
+      g.removeNode(v);
+      node.label.points = [
+        { x: x + 2 * dx / 3, y: y - dy },
+        { x: x + 5 * dx / 6, y: y - dy },
+        { x: x +     dx    , y: y },
+        { x: x + 5 * dx / 6, y: y + dy },
+        { x: x + 2 * dx / 3, y: y + dy },
+      ];
+      node.label.x = node.x;
+      node.label.y = node.y;
+    }
+  });
+}
+
+function selectNumberAttrs(obj, attrs) {
+  return _.mapValues(_.pick(obj, attrs), Number);
+}
+
+function canonicalize(attrs) {
+  var newAttrs = {};
+  _.each(attrs, function(v, k) {
+    newAttrs[k.toLowerCase()] = v;
+  });
+  return newAttrs;
+}
+
+},{"./acyclic":2,"./add-border-segments":3,"./coordinate-system":4,"./graphlib":7,"./lodash":10,"./nesting-graph":11,"./normalize":12,"./order":17,"./parent-dummy-chains":22,"./position":24,"./rank":26,"./util":29}],10:[function(require,module,exports){
+/* global window */
+
+var lodash;
+
+if (require) {
+  try {
+    lodash = require("lodash");
+  } catch (e) {}
+}
+
+if (!lodash) {
+  lodash = window._;
+}
+
+module.exports = lodash;
+
+},{"lodash":51}],11:[function(require,module,exports){
+var _ = require("./lodash"),
+    util = require("./util");
+
+module.exports = {
+  run: run,
+  cleanup: cleanup
+};
+
+/*
+ * A nesting graph creates dummy nodes for the tops and bottoms of subgraphs,
+ * adds appropriate edges to ensure that all cluster nodes are placed between
+ * these boundries, and ensures that the graph is connected.
+ *
+ * In addition we ensure, through the use of the minlen property, that nodes
+ * and subgraph border nodes to not end up on the same rank.
+ *
+ * Preconditions:
+ *
+ *    1. Input graph is a DAG
+ *    2. Nodes in the input graph has a minlen attribute
+ *
+ * Postconditions:
+ *
+ *    1. Input graph is connected.
+ *    2. Dummy nodes are added for the tops and bottoms of subgraphs.
+ *    3. The minlen attribute for nodes is adjusted to ensure nodes do not
+ *       get placed on the same rank as subgraph border nodes.
+ *
+ * The nesting graph idea comes from Sander, "Layout of Compound Directed
+ * Graphs."
+ */
+function run(g) {
+  var root = util.addDummyNode(g, "root", {}, "_root"),
+      depths = treeDepths(g),
+      height = _.max(depths) - 1,
+      nodeSep = 2 * height + 1;
+
+  g.graph().nestingRoot = root;
+
+  // Multiply minlen by nodeSep to align nodes on non-border ranks.
+  _.each(g.edges(), function(e) { g.edge(e).minlen *= nodeSep; });
+
+  // Calculate a weight that is sufficient to keep subgraphs vertically compact
+  var weight = sumWeights(g) + 1;
+
+  // Create border nodes and link them up
+  _.each(g.children(), function(child) {
+    dfs(g, root, nodeSep, weight, height, depths, child);
+  });
+
+  // Save the multiplier for node layers for later removal of empty border
+  // layers.
+  g.graph().nodeRankFactor = nodeSep;
+}
+
+function dfs(g, root, nodeSep, weight, height, depths, v) {
+  var children = g.children(v);
+  if (!children.length) {
+    if (v !== root) {
+      g.setEdge(root, v, { weight: 0, minlen: nodeSep });
+    }
+    return;
+  }
+
+  var top = util.addBorderNode(g, "_bt"),
+      bottom = util.addBorderNode(g, "_bb"),
+      label = g.node(v);
+
+  g.setParent(top, v);
+  label.borderTop = top;
+  g.setParent(bottom, v);
+  label.borderBottom = bottom;
+
+  _.each(children, function(child) {
+    dfs(g, root, nodeSep, weight, height, depths, child);
+
+    var childNode = g.node(child),
+        childTop = childNode.borderTop ? childNode.borderTop : child,
+        childBottom = childNode.borderBottom ? childNode.borderBottom : child,
+        thisWeight = childNode.borderTop ? weight : 2 * weight,
+        minlen = childTop !== childBottom ? 1 : height - depths[v] + 1;
+
+    g.setEdge(top, childTop, {
+      weight: thisWeight,
+      minlen: minlen,
+      nestingEdge: true
+    });
+
+    g.setEdge(childBottom, bottom, {
+      weight: thisWeight,
+      minlen: minlen,
+      nestingEdge: true
+    });
+  });
+
+  if (!g.parent(v)) {
+    g.setEdge(root, top, { weight: 0, minlen: height + depths[v] });
+  }
+}
+
+function treeDepths(g) {
+  var depths = {};
+  function dfs(v, depth) {
+    var children = g.children(v);
+    if (children && children.length) {
+      _.each(children, function(child) {
+        dfs(child, depth + 1);
+      });
+    }
+    depths[v] = depth;
+  }
+  _.each(g.children(), function(v) { dfs(v, 1); });
+  return depths;
+}
+
+function sumWeights(g) {
+  return _.reduce(g.edges(), function(acc, e) {
+    return acc + g.edge(e).weight;
+  }, 0);
+}
+
+function cleanup(g) {
+  var graphLabel = g.graph();
+  g.removeNode(graphLabel.nestingRoot);
+  delete graphLabel.nestingRoot;
+  _.each(g.edges(), function(e) {
+    var edge = g.edge(e);
+    if (edge.nestingEdge) {
+      g.removeEdge(e);
+    }
+  });
+}
+
+},{"./lodash":10,"./util":29}],12:[function(require,module,exports){
+"use strict";
+
+var _ = require("./lodash"),
+    util = require("./util");
+
+module.exports = {
+  run: run,
+  undo: undo
+};
+
+/*
+ * Breaks any long edges in the graph into short segments that span 1 layer
+ * each. This operation is undoable with the denormalize function.
+ *
+ * Pre-conditions:
+ *
+ *    1. The input graph is a DAG.
+ *    2. Each node in the graph has a "rank" property.
+ *
+ * Post-condition:
+ *
+ *    1. All edges in the graph have a length of 1.
+ *    2. Dummy nodes are added where edges have been split into segments.
+ *    3. The graph is augmented with a "dummyChains" attribute which contains
+ *       the first dummy in each chain of dummy nodes produced.
+ */
+function run(g) {
+  g.graph().dummyChains = [];
+  _.each(g.edges(), function(edge) { normalizeEdge(g, edge); });
+}
+
+function normalizeEdge(g, e) {
+  var v = e.v,
+      vRank = g.node(v).rank,
+      w = e.w,
+      wRank = g.node(w).rank,
+      name = e.name,
+      edgeLabel = g.edge(e),
+      labelRank = edgeLabel.labelRank;
+
+  if (wRank === vRank + 1) return;
+
+  g.removeEdge(e);
+
+  var dummy, attrs, i;
+  for (i = 0, ++vRank; vRank < wRank; ++i, ++vRank) {
+    edgeLabel.points = [];
+    attrs = {
+      width: 0, height: 0,
+      edgeLabel: edgeLabel, edgeObj: e,
+      rank: vRank
+    };
+    dummy = util.addDummyNode(g, "edge", attrs, "_d");
+    if (vRank === labelRank) {
+      attrs.width = edgeLabel.width;
+      attrs.height = edgeLabel.height;
+      attrs.dummy = "edge-label";
+      attrs.labelpos = edgeLabel.labelpos;
+    }
+    g.setEdge(v, dummy, { weight: edgeLabel.weight }, name);
+    if (i === 0) {
+      g.graph().dummyChains.push(dummy);
+    }
+    v = dummy;
+  }
+
+  g.setEdge(v, w, { weight: edgeLabel.weight }, name);
+}
+
+function undo(g) {
+  _.each(g.graph().dummyChains, function(v) {
+    var node = g.node(v),
+        origLabel = node.edgeLabel,
+        w;
+    g.setEdge(node.edgeObj, origLabel);
+    while (node.dummy) {
+      w = g.successors(v)[0];
+      g.removeNode(v);
+      origLabel.points.push({ x: node.x, y: node.y });
+      if (node.dummy === "edge-label") {
+        origLabel.x = node.x;
+        origLabel.y = node.y;
+        origLabel.width = node.width;
+        origLabel.height = node.height;
+      }
+      v = w;
+      node = g.node(v);
+    }
+  });
+}
+
+},{"./lodash":10,"./util":29}],13:[function(require,module,exports){
+var _ = require("../lodash");
+
+module.exports = addSubgraphConstraints;
+
+function addSubgraphConstraints(g, cg, vs) {
+  var prev = {},
+      rootPrev;
+
+  _.each(vs, function(v) {
+    var child = g.parent(v),
+        parent,
+        prevChild;
+    while (child) {
+      parent = g.parent(child);
+      if (parent) {
+        prevChild = prev[parent];
+        prev[parent] = child;
+      } else {
+        prevChild = rootPrev;
+        rootPrev = child;
+      }
+      if (prevChild && prevChild !== child) {
+        cg.setEdge(prevChild, child);
+        return;
+      }
+      child = parent;
+    }
+  });
+
+  /*
+  function dfs(v) {
+    var children = v ? g.children(v) : g.children();
+    if (children.length) {
+      var min = Number.POSITIVE_INFINITY,
+          subgraphs = [];
+      _.each(children, function(child) {
+        var childMin = dfs(child);
+        if (g.children(child).length) {
+          subgraphs.push({ v: child, order: childMin });
+        }
+        min = Math.min(min, childMin);
+      });
+      _.reduce(_.sortBy(subgraphs, "order"), function(prev, curr) {
+        cg.setEdge(prev.v, curr.v);
+        return curr;
+      });
+      return min;
+    }
+    return g.node(v).order;
+  }
+  dfs(undefined);
+  */
+}
+
+},{"../lodash":10}],14:[function(require,module,exports){
+var _ = require("../lodash");
+
+module.exports = barycenter;
+
+function barycenter(g, movable) {
+  return _.map(movable, function(v) {
+    var inV = g.inEdges(v);
+    if (!inV.length) {
+      return { v: v };
+    } else {
+      var result = _.reduce(inV, function(acc, e) {
+        var edge = g.edge(e),
+            nodeU = g.node(e.v);
+        return {
+          sum: acc.sum + (edge.weight * nodeU.order),
+          weight: acc.weight + edge.weight
+        };
+      }, { sum: 0, weight: 0 });
+
+      return {
+        v: v,
+        barycenter: result.sum / result.weight,
+        weight: result.weight
+      };
+    }
+  });
+}
+
+
+},{"../lodash":10}],15:[function(require,module,exports){
+var _ = require("../lodash"),
+    Graph = require("../graphlib").Graph;
+
+module.exports = buildLayerGraph;
+
+/*
+ * Constructs a graph that can be used to sort a layer of nodes. The graph will
+ * contain all base and subgraph nodes from the request layer in their original
+ * hierarchy and any edges that are incident on these nodes and are of the type
+ * requested by the "relationship" parameter.
+ *
+ * Nodes from the requested rank that do not have parents are assigned a root
+ * node in the output graph, which is set in the root graph attribute. This
+ * makes it easy to walk the hierarchy of movable nodes during ordering.
+ *
+ * Pre-conditions:
+ *
+ *    1. Input graph is a DAG
+ *    2. Base nodes in the input graph have a rank attribute
+ *    3. Subgraph nodes in the input graph has minRank and maxRank attributes
+ *    4. Edges have an assigned weight
+ *
+ * Post-conditions:
+ *
+ *    1. Output graph has all nodes in the movable rank with preserved
+ *       hierarchy.
+ *    2. Root nodes in the movable layer are made children of the node
+ *       indicated by the root attribute of the graph.
+ *    3. Non-movable nodes incident on movable nodes, selected by the
+ *       relationship parameter, are included in the graph (without hierarchy).
+ *    4. Edges incident on movable nodes, selected by the relationship
+ *       parameter, are added to the output graph.
+ *    5. The weights for copied edges are aggregated as need, since the output
+ *       graph is not a multi-graph.
+ */
+function buildLayerGraph(g, rank, relationship) {
+  var root = createRootNode(g),
+      result = new Graph({ compound: true }).setGraph({ root: root })
+                  .setDefaultNodeLabel(function(v) { return g.node(v); });
+
+  _.each(g.nodes(), function(v) {
+    var node = g.node(v),
+        parent = g.parent(v);
+
+    if (node.rank === rank || node.minRank <= rank && rank <= node.maxRank) {
+      result.setNode(v);
+      result.setParent(v, parent || root);
+
+      // This assumes we have only short edges!
+      _.each(g[relationship](v), function(e) {
+        var u = e.v === v ? e.w : e.v,
+            edge = result.edge(u, v),
+            weight = !_.isUndefined(edge) ? edge.weight : 0;
+        result.setEdge(u, v, { weight: g.edge(e).weight + weight });
+      });
+
+      if (_.has(node, "minRank")) {
+        result.setNode(v, {
+          borderLeft: node.borderLeft[rank],
+          borderRight: node.borderRight[rank]
+        });
+      }
+    }
+  });
+
+  return result;
+}
+
+function createRootNode(g) {
+  var v;
+  while (g.hasNode((v = _.uniqueId("_root"))));
+  return v;
+}
+
+},{"../graphlib":7,"../lodash":10}],16:[function(require,module,exports){
+"use strict";
+
+var _ = require("../lodash");
+
+module.exports = crossCount;
+
+/*
+ * A function that takes a layering (an array of layers, each with an array of
+ * ordererd nodes) and a graph and returns a weighted crossing count.
+ *
+ * Pre-conditions:
+ *
+ *    1. Input graph must be simple (not a multigraph), directed, and include
+ *       only simple edges.
+ *    2. Edges in the input graph must have assigned weights.
+ *
+ * Post-conditions:
+ *
+ *    1. The graph and layering matrix are left unchanged.
+ *
+ * This algorithm is derived from Barth, et al., "Bilayer Cross Counting."
+ */
+function crossCount(g, layering) {
+  var cc = 0;
+  for (var i = 1; i < layering.length; ++i) {
+    cc += twoLayerCrossCount(g, layering[i-1], layering[i]);
+  }
+  return cc;
+}
+
+function twoLayerCrossCount(g, northLayer, southLayer) {
+  // Sort all of the edges between the north and south layers by their position
+  // in the north layer and then the south. Map these edges to the position of
+  // their head in the south layer.
+  var southPos = _.zipObject(southLayer,
+                             _.map(southLayer, function (v, i) { return i; }));
+  var southEntries = _.flatten(_.map(northLayer, function(v) {
+    return _.chain(g.outEdges(v))
+            .map(function(e) {
+              return { pos: southPos[e.w], weight: g.edge(e).weight };
+            })
+            .sortBy("pos")
+            .value();
+  }), true);
+
+  // Build the accumulator tree
+  var firstIndex = 1;
+  while (firstIndex < southLayer.length) firstIndex <<= 1;
+  var treeSize = 2 * firstIndex - 1;
+  firstIndex -= 1;
+  var tree = _.map(new Array(treeSize), function() { return 0; });
+
+  // Calculate the weighted crossings
+  var cc = 0;
+  _.each(southEntries.forEach(function(entry) {
+    var index = entry.pos + firstIndex;
+    tree[index] += entry.weight;
+    var weightSum = 0;
+    while (index > 0) {
+      if (index % 2) {
+        weightSum += tree[index + 1];
+      }
+      index = (index - 1) >> 1;
+      tree[index] += entry.weight;
+    }
+    cc += entry.weight * weightSum;
+  }));
+
+  return cc;
+}
+
+},{"../lodash":10}],17:[function(require,module,exports){
+"use strict";
+
+var _ = require("../lodash"),
+    initOrder = require("./init-order"),
+    crossCount = require("./cross-count"),
+    sortSubgraph = require("./sort-subgraph"),
+    buildLayerGraph = require("./build-layer-graph"),
+    addSubgraphConstraints = require("./add-subgraph-constraints"),
+    Graph = require("../graphlib").Graph,
+    util = require("../util");
+
+module.exports = order;
+
+/*
+ * Applies heuristics to minimize edge crossings in the graph and sets the best
+ * order solution as an order attribute on each node.
+ *
+ * Pre-conditions:
+ *
+ *    1. Graph must be DAG
+ *    2. Graph nodes must be objects with a "rank" attribute
+ *    3. Graph edges must have the "weight" attribute
+ *
+ * Post-conditions:
+ *
+ *    1. Graph nodes will have an "order" attribute based on the results of the
+ *       algorithm.
+ */
+function order(g) {
+  var maxRank = util.maxRank(g),
+      downLayerGraphs = buildLayerGraphs(g, _.range(1, maxRank + 1), "inEdges"),
+      upLayerGraphs = buildLayerGraphs(g, _.range(maxRank - 1, -1, -1), "outEdges");
+
+  var layering = initOrder(g);
+  assignOrder(g, layering);
+
+  var bestCC = Number.POSITIVE_INFINITY,
+      best;
+
+  for (var i = 0, lastBest = 0; lastBest < 4; ++i, ++lastBest) {
+    sweepLayerGraphs(i % 2 ? downLayerGraphs : upLayerGraphs, i % 4 >= 2);
+
+    layering = util.buildLayerMatrix(g);
+    var cc = crossCount(g, layering);
+    if (cc < bestCC) {
+      lastBest = 0;
+      best = _.cloneDeep(layering);
+      bestCC = cc;
+    }
+  }
+
+  assignOrder(g, best);
+}
+
+function buildLayerGraphs(g, ranks, relationship) {
+  return _.map(ranks, function(rank) {
+    return buildLayerGraph(g, rank, relationship);
+  });
+}
+
+function sweepLayerGraphs(layerGraphs, biasRight) {
+  var cg = new Graph();
+  _.each(layerGraphs, function(lg) {
+    var root = lg.graph().root;
+    var sorted = sortSubgraph(lg, root, cg, biasRight);
+    _.each(sorted.vs, function(v, i) {
+      lg.node(v).order = i;
+    });
+    addSubgraphConstraints(lg, cg, sorted.vs);
+  });
+}
+
+function assignOrder(g, layering) {
+  _.each(layering, function(layer) {
+    _.each(layer, function(v, i) {
+      g.node(v).order = i;
+    });
+  });
+}
+
+},{"../graphlib":7,"../lodash":10,"../util":29,"./add-subgraph-constraints":13,"./build-layer-graph":15,"./cross-count":16,"./init-order":18,"./sort-subgraph":20}],18:[function(require,module,exports){
+"use strict";
+
+var _ = require("../lodash");
+
+module.exports = initOrder;
+
+/*
+ * Assigns an initial order value for each node by performing a DFS search
+ * starting from nodes in the first rank. Nodes are assigned an order in their
+ * rank as they are first visited.
+ *
+ * This approach comes from Gansner, et al., "A Technique for Drawing Directed
+ * Graphs."
+ *
+ * Returns a layering matrix with an array per layer and each layer sorted by
+ * the order of its nodes.
+ */
+function initOrder(g) {
+  var visited = {},
+      simpleNodes = _.filter(g.nodes(), function(v) {
+        return !g.children(v).length;
+      }),
+      maxRank = _.max(_.map(simpleNodes, function(v) { return g.node(v).rank; })),
+      layers = _.map(_.range(maxRank + 1), function() { return []; });
+
+  function dfs(v) {
+    if (_.has(visited, v)) return;
+    visited[v] = true;
+    var node = g.node(v);
+    layers[node.rank].push(v);
+    _.each(g.successors(v), dfs);
+  }
+
+  var orderedVs = _.sortBy(simpleNodes, function(v) { return g.node(v).rank; });
+  _.each(orderedVs, dfs);
+
+  return layers;
+}
+
+},{"../lodash":10}],19:[function(require,module,exports){
+"use strict";
+
+var _ = require("../lodash");
+
+module.exports = resolveConflicts;
+
+/*
+ * Given a list of entries of the form {v, barycenter, weight} and a
+ * constraint graph this function will resolve any conflicts between the
+ * constraint graph and the barycenters for the entries. If the barycenters for
+ * an entry would violate a constraint in the constraint graph then we coalesce
+ * the nodes in the conflict into a new node that respects the contraint and
+ * aggregates barycenter and weight information.
+ *
+ * This implementation is based on the description in Forster, "A Fast and
+ * Simple Hueristic for Constrained Two-Level Crossing Reduction," thought it
+ * differs in some specific details.
+ *
+ * Pre-conditions:
+ *
+ *    1. Each entry has the form {v, barycenter, weight}, or if the node has
+ *       no barycenter, then {v}.
+ *
+ * Returns:
+ *
+ *    A new list of entries of the form {vs, i, barycenter, weight}. The list
+ *    `vs` may either be a singleton or it may be an aggregation of nodes
+ *    ordered such that they do not violate constraints from the constraint
+ *    graph. The property `i` is the lowest original index of any of the
+ *    elements in `vs`.
+ */
+function resolveConflicts(entries, cg) {
+  var mappedEntries = {};
+  _.each(entries, function(entry, i) {
+    var tmp = mappedEntries[entry.v] = {
+      indegree: 0,
+      "in": [],
+      out: [],
+      vs: [entry.v],
+      i: i
+    };
+    if (!_.isUndefined(entry.barycenter)) {
+      tmp.barycenter = entry.barycenter;
+      tmp.weight = entry.weight;
+    }
+  });
+
+  _.each(cg.edges(), function(e) {
+    var entryV = mappedEntries[e.v],
+        entryW = mappedEntries[e.w];
+    if (!_.isUndefined(entryV) && !_.isUndefined(entryW)) {
+      entryW.indegree++;
+      entryV.out.push(mappedEntries[e.w]);
+    }
+  });
+
+  var sourceSet = _.filter(mappedEntries, function(entry) {
+    return !entry.indegree;
+  });
+
+  return doResolveConflicts(sourceSet);
+}
+
+function doResolveConflicts(sourceSet) {
+  var entries = [];
+
+  function handleIn(vEntry) {
+    return function(uEntry) {
+      if (uEntry.merged) {
+        return;
+      }
+      if (_.isUndefined(uEntry.barycenter) ||
+          _.isUndefined(vEntry.barycenter) ||
+          uEntry.barycenter >= vEntry.barycenter) {
+        mergeEntries(vEntry, uEntry);
+      }
+    };
+  }
+
+  function handleOut(vEntry) {
+    return function(wEntry) {
+      wEntry["in"].push(vEntry);
+      if (--wEntry.indegree === 0) {
+        sourceSet.push(wEntry);
+      }
+    };
+  }
+
+  while (sourceSet.length) {
+    var entry = sourceSet.pop();
+    entries.push(entry);
+    _.each(entry["in"].reverse(), handleIn(entry));
+    _.each(entry.out, handleOut(entry));
+  }
+
+  return _.chain(entries)
+          .filter(function(entry) { return !entry.merged; })
+          .map(function(entry) {
+            return _.pick(entry, ["vs", "i", "barycenter", "weight"]);
+          })
+          .value();
+}
+
+function mergeEntries(target, source) {
+  var sum = 0,
+      weight = 0;
+
+  if (target.weight) {
+    sum += target.barycenter * target.weight;
+    weight += target.weight;
+  }
+
+  if (source.weight) {
+    sum += source.barycenter * source.weight;
+    weight += source.weight;
+  }
+
+  target.vs = source.vs.concat(target.vs);
+  target.barycenter = sum / weight;
+  target.weight = weight;
+  target.i = Math.min(source.i, target.i);
+  source.merged = true;
+}
+
+},{"../lodash":10}],20:[function(require,module,exports){
+var _ = require("../lodash"),
+    barycenter = require("./barycenter"),
+    resolveConflicts = require("./resolve-conflicts"),
+    sort = require("./sort");
+
+module.exports = sortSubgraph;
+
+function sortSubgraph(g, v, cg, biasRight) {
+  var movable = g.children(v),
+      node = g.node(v),
+      bl = node ? node.borderLeft : undefined,
+      br = node ? node.borderRight: undefined,
+      subgraphs = {};
+
+  if (bl) {
+    movable = _.filter(movable, function(w) {
+      return w !== bl && w !== br;
+    });
+  }
+
+  var barycenters = barycenter(g, movable);
+  _.each(barycenters, function(entry) {
+    if (g.children(entry.v).length) {
+      var subgraphResult = sortSubgraph(g, entry.v, cg, biasRight);
+      subgraphs[entry.v] = subgraphResult;
+      if (_.has(subgraphResult, "barycenter")) {
+        mergeBarycenters(entry, subgraphResult);
+      }
+    }
+  });
+
+  var entries = resolveConflicts(barycenters, cg);
+  expandSubgraphs(entries, subgraphs);
+
+  var result = sort(entries, biasRight);
+
+  if (bl) {
+    result.vs = _.flatten([bl, result.vs, br], true);
+    if (g.predecessors(bl).length) {
+      var blPred = g.node(g.predecessors(bl)[0]),
+          brPred = g.node(g.predecessors(br)[0]);
+      if (!_.has(result, "barycenter")) {
+        result.barycenter = 0;
+        result.weight = 0;
+      }
+      result.barycenter = (result.barycenter * result.weight +
+                           blPred.order + brPred.order) / (result.weight + 2);
+      result.weight += 2;
+    }
+  }
+
+  return result;
+}
+
+function expandSubgraphs(entries, subgraphs) {
+  _.each(entries, function(entry) {
+    entry.vs = _.flatten(entry.vs.map(function(v) {
+      if (subgraphs[v]) {
+        return subgraphs[v].vs;
+      }
+      return v;
+    }), true);
+  });
+}
+
+function mergeBarycenters(target, other) {
+  if (!_.isUndefined(target.barycenter)) {
+    target.barycenter = (target.barycenter * target.weight +
+                         other.barycenter * other.weight) /
+                        (target.weight + other.weight);
+    target.weight += other.weight;
+  } else {
+    target.barycenter = other.barycenter;
+    target.weight = other.weight;
+  }
+}
+
+},{"../lodash":10,"./barycenter":14,"./resolve-conflicts":19,"./sort":21}],21:[function(require,module,exports){
+var _ = require("../lodash"),
+    util = require("../util");
+
+module.exports = sort;
+
+function sort(entries, biasRight) {
+  var parts = util.partition(entries, function(entry) {
+    return _.has(entry, "barycenter");
+  });
+  var sortable = parts.lhs,
+      unsortable = _.sortBy(parts.rhs, function(entry) { return -entry.i; }),
+      vs = [],
+      sum = 0,
+      weight = 0,
+      vsIndex = 0;
+
+  sortable.sort(compareWithBias(!!biasRight));
+
+  vsIndex = consumeUnsortable(vs, unsortable, vsIndex);
+
+  _.each(sortable, function (entry) {
+    vsIndex += entry.vs.length;
+    vs.push(entry.vs);
+    sum += entry.barycenter * entry.weight;
+    weight += entry.weight;
+    vsIndex = consumeUnsortable(vs, unsortable, vsIndex);
+  });
+
+  var result = { vs: _.flatten(vs, true) };
+  if (weight) {
+    result.barycenter = sum / weight;
+    result.weight = weight;
+  }
+  return result;
+}
+
+function consumeUnsortable(vs, unsortable, index) {
+  var last;
+  while (unsortable.length && (last = _.last(unsortable)).i <= index) {
+    unsortable.pop();
+    vs.push(last.vs);
+    index++;
+  }
+  return index;
+}
+
+function compareWithBias(bias) {
+  return function(entryV, entryW) {
+    if (entryV.barycenter < entryW.barycenter) {
+      return -1;
+    } else if (entryV.barycenter > entryW.barycenter) {
+      return 1;
+    }
+
+    return !bias ? entryV.i - entryW.i : entryW.i - entryV.i;
+  };
+}
+
+},{"../lodash":10,"../util":29}],22:[function(require,module,exports){
+var _ = require("./lodash");
+
+module.exports = parentDummyChains;
+
+function parentDummyChains(g) {
+  var postorderNums = postorder(g);
+
+  _.each(g.graph().dummyChains, function(v) {
+    var node = g.node(v),
+        edgeObj = node.edgeObj,
+        pathData = findPath(g, postorderNums, edgeObj.v, edgeObj.w),
+        path = pathData.path,
+        lca = pathData.lca,
+        pathIdx = 0,
+        pathV = path[pathIdx],
+        ascending = true;
+
+    while (v !== edgeObj.w) {
+      node = g.node(v);
+
+      if (ascending) {
+        while ((pathV = path[pathIdx]) !== lca &&
+               g.node(pathV).maxRank < node.rank) {
+          pathIdx++;
+        }
+
+        if (pathV === lca) {
+          ascending = false;
+        }
+      }
+
+      if (!ascending) {
+        while (pathIdx < path.length - 1 &&
+               g.node(pathV = path[pathIdx + 1]).minRank <= node.rank) {
+          pathIdx++;
+        }
+        pathV = path[pathIdx];
+      }
+
+      g.setParent(v, pathV);
+      v = g.successors(v)[0];
+    }
+  });
+}
+
+// Find a path from v to w through the lowest common ancestor (LCA). Return the
+// full path and the LCA.
+function findPath(g, postorderNums, v, w) {
+  var vPath = [],
+      wPath = [],
+      low = Math.min(postorderNums[v].low, postorderNums[w].low),
+      lim = Math.max(postorderNums[v].lim, postorderNums[w].lim),
+      parent,
+      lca;
+
+  // Traverse up from v to find the LCA
+  parent = v;
+  do {
+    parent = g.parent(parent);
+    vPath.push(parent);
+  } while (parent &&
+           (postorderNums[parent].low > low || lim > postorderNums[parent].lim));
+  lca = parent;
+
+  // Traverse from w to LCA
+  parent = w;
+  while ((parent = g.parent(parent)) !== lca) {
+    wPath.push(parent);
+  }
+
+  return { path: vPath.concat(wPath.reverse()), lca: lca };
+}
+
+function postorder(g) {
+  var result = {},
+      lim = 0;
+
+  function dfs(v) {
+    var low = lim;
+    _.each(g.children(v), dfs);
+    result[v] = { low: low, lim: lim++ };
+  }
+  _.each(g.children(), dfs);
+
+  return result;
+}
+
+},{"./lodash":10}],23:[function(require,module,exports){
+"use strict";
+
+var _ = require("../lodash"),
+    Graph = require("../graphlib").Graph,
+    util = require("../util");
+
+/*
+ * This module provides coordinate assignment based on Brandes and Köpf, "Fast
+ * and Simple Horizontal Coordinate Assignment."
+ */
+
+module.exports = {
+  positionX: positionX,
+  findType1Conflicts: findType1Conflicts,
+  findType2Conflicts: findType2Conflicts,
+  addConflict: addConflict,
+  hasConflict: hasConflict,
+  verticalAlignment: verticalAlignment,
+  horizontalCompaction: horizontalCompaction,
+  alignCoordinates: alignCoordinates,
+  findSmallestWidthAlignment: findSmallestWidthAlignment,
+  balance: balance
+};
+
+/*
+ * Marks all edges in the graph with a type-1 conflict with the "type1Conflict"
+ * property. A type-1 conflict is one where a non-inner segment crosses an
+ * inner segment. An inner segment is an edge with both incident nodes marked
+ * with the "dummy" property.
+ *
+ * This algorithm scans layer by layer, starting with the second, for type-1
+ * conflicts between the current layer and the previous layer. For each layer
+ * it scans the nodes from left to right until it reaches one that is incident
+ * on an inner segment. It then scans predecessors to determine if they have
+ * edges that cross that inner segment. At the end a final scan is done for all
+ * nodes on the current rank to see if they cross the last visited inner
+ * segment.
+ *
+ * This algorithm (safely) assumes that a dummy node will only be incident on a
+ * single node in the layers being scanned.
+ */
+function findType1Conflicts(g, layering) {
+  var conflicts = {};
+
+  function visitLayer(prevLayer, layer) {
+    var
+      // last visited node in the previous layer that is incident on an inner
+      // segment.
+      k0 = 0,
+      // Tracks the last node in this layer scanned for crossings with a type-1
+      // segment.
+      scanPos = 0,
+      prevLayerLength = prevLayer.length,
+      lastNode = _.last(layer);
+
+    _.each(layer, function(v, i) {
+      var w = findOtherInnerSegmentNode(g, v),
+          k1 = w ? g.node(w).order : prevLayerLength;
+
+      if (w || v === lastNode) {
+        _.each(layer.slice(scanPos, i +1), function(scanNode) {
+          _.each(g.predecessors(scanNode), function(u) {
+            var uLabel = g.node(u),
+                uPos = uLabel.order;
+            if ((uPos < k0 || k1 < uPos) &&
+                !(uLabel.dummy && g.node(scanNode).dummy)) {
+              addConflict(conflicts, u, scanNode);
+            }
+          });
+        });
+        scanPos = i + 1;
+        k0 = k1;
+      }
+    });
+
+    return layer;
+  }
+
+  _.reduce(layering, visitLayer);
+  return conflicts;
+}
+
+function findType2Conflicts(g, layering) {
+  var conflicts = {};
+
+  function scan(south, southPos, southEnd, prevNorthBorder, nextNorthBorder) {
+    var v;
+    _.each(_.range(southPos, southEnd), function(i) {
+      v = south[i];
+      if (g.node(v).dummy) {
+        _.each(g.predecessors(v), function(u) {
+          var uNode = g.node(u);
+          if (uNode.dummy &&
+              (uNode.order < prevNorthBorder || uNode.order > nextNorthBorder)) {
+            addConflict(conflicts, u, v);
+          }
+        });
+      }
+    });
+  }
+
+
+  function visitLayer(north, south) {
+    var prevNorthPos = -1,
+        nextNorthPos,
+        southPos = 0;
+
+    _.each(south, function(v, southLookahead) {
+      if (g.node(v).dummy === "border") {
+        var predecessors = g.predecessors(v);
+        if (predecessors.length) {
+          nextNorthPos = g.node(predecessors[0]).order;
+          scan(south, southPos, southLookahead, prevNorthPos, nextNorthPos);
+          southPos = southLookahead;
+          prevNorthPos = nextNorthPos;
+        }
+      }
+      scan(south, southPos, south.length, nextNorthPos, north.length);
+    });
+
+    return south;
+  }
+
+  _.reduce(layering, visitLayer);
+  return conflicts;
+}
+
+function findOtherInnerSegmentNode(g, v) {
+  if (g.node(v).dummy) {
+    return _.find(g.predecessors(v), function(u) {
+      return g.node(u).dummy;
+    });
+  }
+}
+
+function addConflict(conflicts, v, w) {
+  if (v > w) {
+    var tmp = v;
+    v = w;
+    w = tmp;
+  }
+
+  var conflictsV = conflicts[v];
+  if (!conflictsV) {
+    conflicts[v] = conflictsV = {};
+  }
+  conflictsV[w] = true;
+}
+
+function hasConflict(conflicts, v, w) {
+  if (v > w) {
+    var tmp = v;
+    v = w;
+    w = tmp;
+  }
+  return _.has(conflicts[v], w);
+}
+
+/*
+ * Try to align nodes into vertical "blocks" where possible. This algorithm
+ * attempts to align a node with one of its median neighbors. If the edge
+ * connecting a neighbor is a type-1 conflict then we ignore that possibility.
+ * If a previous node has already formed a block with a node after the node
+ * we're trying to form a block with, we also ignore that possibility - our
+ * blocks would be split in that scenario.
+ */
+function verticalAlignment(g, layering, conflicts, neighborFn) {
+  var root = {},
+      align = {},
+      pos = {};
+
+  // We cache the position here based on the layering because the graph and
+  // layering may be out of sync. The layering matrix is manipulated to
+  // generate different extreme alignments.
+  _.each(layering, function(layer) {
+    _.each(layer, function(v, order) {
+      root[v] = v;
+      align[v] = v;
+      pos[v] = order;
+    });
+  });
+
+  _.each(layering, function(layer) {
+    var prevIdx = -1;
+    _.each(layer, function(v) {
+      var ws = neighborFn(v);
+      if (ws.length) {
+        ws = _.sortBy(ws, function(w) { return pos[w]; });
+        var mp = (ws.length - 1) / 2;
+        for (var i = Math.floor(mp), il = Math.ceil(mp); i <= il; ++i) {
+          var w = ws[i];
+          if (align[v] === v &&
+              prevIdx < pos[w] &&
+              !hasConflict(conflicts, v, w)) {
+            align[w] = v;
+            align[v] = root[v] = root[w];
+            prevIdx = pos[w];
+          }
+        }
+      }
+    });
+  });
+
+  return { root: root, align: align };
+}
+
+function horizontalCompaction(g, layering, root, align, reverseSep) {
+  // This portion of the algorithm differs from BK due to a number of problems.
+  // Instead of their algorithm we construct a new block graph and do two
+  // sweeps. The first sweep places blocks with the smallest possible
+  // coordinates. The second sweep removes unused space by moving blocks to the
+  // greatest coordinates without violating separation.
+  var xs = {},
+      blockG = buildBlockGraph(g, layering, root, reverseSep);
+
+  // First pass, assign smallest coordinates via DFS
+  var visited = {};
+  function pass1(v) {
+    if (!_.has(visited, v)) {
+      visited[v] = true;
+      xs[v] = _.reduce(blockG.inEdges(v), function(max, e) {
+        pass1(e.v);
+        return Math.max(max, xs[e.v] + blockG.edge(e));
+      }, 0);
+    }
+  }
+  _.each(blockG.nodes(), pass1);
+
+  function pass2(v) {
+    if (visited[v] !== 2) {
+      visited[v]++;
+      var min = _.reduce(blockG.outEdges(v), function(min, e) {
+        pass2(e.w);
+        return Math.min(min, xs[e.w] - blockG.edge(e));
+      }, Number.POSITIVE_INFINITY);
+      if (min !== Number.POSITIVE_INFINITY) {
+        xs[v] = Math.max(xs[v], min);
+      }
+    }
+  }
+  _.each(blockG.nodes(), pass2);
+
+
+  // Assign x coordinates to all nodes
+  _.each(align, function(v) {
+    xs[v] = xs[root[v]];
+  });
+
+  return xs;
+}
+
+
+function buildBlockGraph(g, layering, root, reverseSep) {
+  var blockGraph = new Graph(),
+      graphLabel = g.graph(),
+      sepFn = sep(graphLabel.nodesep, graphLabel.edgesep, reverseSep);
+
+  _.each(layering, function(layer) {
+    var u;
+    _.each(layer, function(v) {
+      var vRoot = root[v];
+      blockGraph.setNode(vRoot);
+      if (u) {
+        var uRoot = root[u],
+            prevMax = blockGraph.edge(uRoot, vRoot);
+        blockGraph.setEdge(uRoot, vRoot, Math.max(sepFn(g, v, u), prevMax || 0));
+      }
+      u = v;
+    });
+  });
+
+  return blockGraph;
+}
+
+/*
+ * Returns the alignment that has the smallest width of the given alignments.
+ */
+function findSmallestWidthAlignment(g, xss) {
+  return _.min(xss, function(xs) {
+    var min = _.min(xs, function(x, v) { return x - width(g, v) / 2; }),
+        max = _.max(xs, function(x, v) { return x + width(g, v) / 2; });
+    return max - min;
+  });
+}
+
+/*
+ * Align the coordinates of each of the layout alignments such that
+ * left-biased alignments have their minimum coordinate at the same point as
+ * the minimum coordinate of the smallest width alignment and right-biased
+ * alignments have their maximum coordinate at the same point as the maximum
+ * coordinate of the smallest width alignment.
+ */
+function alignCoordinates(xss, alignTo) {
+  var alignToMin = _.min(alignTo),
+      alignToMax = _.max(alignTo);
+
+  _.each(["u", "d"], function(vert) {
+    _.each(["l", "r"], function(horiz) {
+      var alignment = vert + horiz,
+          xs = xss[alignment],
+          delta;
+      if (xs === alignTo) return;
+
+      delta = horiz === "l" ? alignToMin - _.min(xs) : alignToMax - _.max(xs);
+
+      if (delta) {
+        xss[alignment] = _.mapValues(xs, function(x) { return x + delta; });
+      }
+    });
+  });
+}
+
+function balance(xss, align) {
+  return _.mapValues(xss.ul, function(ignore, v) {
+    if (align) {
+      return xss[align.toLowerCase()][v];
+    } else {
+      var xs = _.sortBy(_.pluck(xss, v));
+      return (xs[1] + xs[2]) / 2;
+    }
+  });
+}
+
+function positionX(g) {
+  var layering = util.buildLayerMatrix(g),
+      conflicts = _.merge(findType1Conflicts(g, layering),
+                          findType2Conflicts(g, layering));
+
+  var xss = {},
+      adjustedLayering;
+  _.each(["u", "d"], function(vert) {
+    adjustedLayering = vert === "u" ? layering : _.values(layering).reverse();
+    _.each(["l", "r"], function(horiz) {
+      if (horiz === "r") {
+        adjustedLayering = _.map(adjustedLayering, function(inner) {
+          return _.values(inner).reverse();
+        });
+      }
+
+      var neighborFn = _.bind(vert === "u" ? g.predecessors : g.successors, g);
+      var align = verticalAlignment(g, adjustedLayering, conflicts, neighborFn);
+      var xs = horizontalCompaction(g, adjustedLayering,
+                                    align.root, align.align,
+                                    horiz === "r");
+      if (horiz === "r") {
+        xs = _.mapValues(xs, function(x) { return -x; });
+      }
+      xss[vert + horiz] = xs;
+    });
+  });
+
+  var smallestWidth = findSmallestWidthAlignment(g, xss);
+  alignCoordinates(xss, smallestWidth);
+  return balance(xss, g.graph().align);
+}
+
+function sep(nodeSep, edgeSep, reverseSep) {
+  return function(g, v, w) {
+    var vLabel = g.node(v),
+        wLabel = g.node(w),
+        sum = 0,
+        delta;
+
+    sum += vLabel.width / 2;
+    if (_.has(vLabel, "labelpos")) {
+      switch (vLabel.labelpos.toLowerCase()) {
+        case "l": delta = -vLabel.width / 2; break;
+        case "r": delta = vLabel.width / 2; break;
+      }
+    }
+    if (delta) {
+      sum += reverseSep ? delta : -delta;
+    }
+    delta = 0;
+
+    sum += (vLabel.dummy ? edgeSep : nodeSep) / 2;
+    sum += (wLabel.dummy ? edgeSep : nodeSep) / 2;
+
+    sum += wLabel.width / 2;
+    if (_.has(wLabel, "labelpos")) {
+      switch (wLabel.labelpos.toLowerCase()) {
+        case "l": delta = wLabel.width / 2; break;
+        case "r": delta = -wLabel.width / 2; break;
+      }
+    }
+    if (delta) {
+      sum += reverseSep ? delta : -delta;
+    }
+    delta = 0;
+
+    return sum;
+  };
+}
+
+function width(g, v) {
+  return g.node(v).width;
+}
+
+},{"../graphlib":7,"../lodash":10,"../util":29}],24:[function(require,module,exports){
+"use strict";
+
+var _ = require("../lodash"),
+    util = require("../util"),
+    positionX = require("./bk").positionX;
+
+module.exports = position;
+
+function position(g) {
+  g = util.asNonCompoundGraph(g);
+
+  positionY(g);
+  _.each(positionX(g), function(x, v) {
+    g.node(v).x = x;
+  });
+}
+
+function positionY(g) {
+  var layering = util.buildLayerMatrix(g),
+      rankSep = g.graph().ranksep,
+      prevY = 0;
+  _.each(layering, function(layer) {
+    var maxHeight = _.max(_.map(layer, function(v) { return g.node(v).height; }));
+    _.each(layer, function(v) {
+      g.node(v).y = prevY + maxHeight / 2;
+    });
+    prevY += maxHeight + rankSep;
+  });
+}
+
+
+},{"../lodash":10,"../util":29,"./bk":23}],25:[function(require,module,exports){
+"use strict";
+
+var _ = require("../lodash"),
+    Graph = require("../graphlib").Graph,
+    slack = require("./util").slack;
+
+module.exports = feasibleTree;
+
+/*
+ * Constructs a spanning tree with tight edges and adjusted the input node's
+ * ranks to achieve this. A tight edge is one that is has a length that matches
+ * its "minlen" attribute.
+ *
+ * The basic structure for this function is derived from Gansner, et al., "A
+ * Technique for Drawing Directed Graphs."
+ *
+ * Pre-conditions:
+ *
+ *    1. Graph must be a DAG.
+ *    2. Graph must be connected.
+ *    3. Graph must have at least one node.
+ *    5. Graph nodes must have been previously assigned a "rank" property that
+ *       respects the "minlen" property of incident edges.
+ *    6. Graph edges must have a "minlen" property.
+ *
+ * Post-conditions:
+ *
+ *    - Graph nodes will have their rank adjusted to ensure that all edges are
+ *      tight.
+ *
+ * Returns a tree (undirected graph) that is constructed using only "tight"
+ * edges.
+ */
+function feasibleTree(g) {
+  var t = new Graph({ directed: false });
+
+  // Choose arbitrary node from which to start our tree
+  var start = g.nodes()[0],
+      size = g.nodeCount();
+  t.setNode(start, {});
+
+  var edge, delta;
+  while (tightTree(t, g) < size) {
+    edge = findMinSlackEdge(t, g);
+    delta = t.hasNode(edge.v) ? slack(g, edge) : -slack(g, edge);
+    shiftRanks(t, g, delta);
+  }
+
+  return t;
+}
+
+/*
+ * Finds a maximal tree of tight edges and returns the number of nodes in the
+ * tree.
+ */
+function tightTree(t, g) {
+  function dfs(v) {
+    _.each(g.nodeEdges(v), function(e) {
+      var edgeV = e.v,
+          w = (v === edgeV) ? e.w : edgeV;
+      if (!t.hasNode(w) && !slack(g, e)) {
+        t.setNode(w, {});
+        t.setEdge(v, w, {});
+        dfs(w);
+      }
+    });
+  }
+
+  _.each(t.nodes(), dfs);
+  return t.nodeCount();
+}
+
+/*
+ * Finds the edge with the smallest slack that is incident on tree and returns
+ * it.
+ */
+function findMinSlackEdge(t, g) {
+  return _.min(g.edges(), function(e) {
+    if (t.hasNode(e.v) !== t.hasNode(e.w)) {
+      return slack(g, e);
+    }
+  });
+}
+
+function shiftRanks(t, g, delta) {
+  _.each(t.nodes(), function(v) {
+    g.node(v).rank += delta;
+  });
+}
+
+},{"../graphlib":7,"../lodash":10,"./util":28}],26:[function(require,module,exports){
+"use strict";
+
+var rankUtil = require("./util"),
+    longestPath = rankUtil.longestPath,
+    feasibleTree = require("./feasible-tree"),
+    networkSimplex = require("./network-simplex");
+
+module.exports = rank;
+
+/*
+ * Assigns a rank to each node in the input graph that respects the "minlen"
+ * constraint specified on edges between nodes.
+ *
+ * This basic structure is derived from Gansner, et al., "A Technique for
+ * Drawing Directed Graphs."
+ *
+ * Pre-conditions:
+ *
+ *    1. Graph must be a connected DAG
+ *    2. Graph nodes must be objects
+ *    3. Graph edges must have "weight" and "minlen" attributes
+ *
+ * Post-conditions:
+ *
+ *    1. Graph nodes will have a "rank" attribute based on the results of the
+ *       algorithm. Ranks can start at any index (including negative), we'll
+ *       fix them up later.
+ */
+function rank(g) {
+  switch(g.graph().ranker) {
+    case "network-simplex": networkSimplexRanker(g); break;
+    case "tight-tree": tightTreeRanker(g); break;
+    case "longest-path": longestPathRanker(g); break;
+    default: networkSimplexRanker(g);
+  }
+}
+
+// A fast and simple ranker, but results are far from optimal.
+var longestPathRanker = longestPath;
+
+function tightTreeRanker(g) {
+  longestPath(g);
+  feasibleTree(g);
+}
+
+function networkSimplexRanker(g) {
+  networkSimplex(g);
+}
+
+},{"./feasible-tree":25,"./network-simplex":27,"./util":28}],27:[function(require,module,exports){
+"use strict";
+
+var _ = require("../lodash"),
+    feasibleTree = require("./feasible-tree"),
+    slack = require("./util").slack,
+    initRank = require("./util").longestPath,
+    preorder = require("../graphlib").alg.preorder,
+    postorder = require("../graphlib").alg.postorder,
+    simplify = require("../util").simplify;
+
+module.exports = networkSimplex;
+
+// Expose some internals for testing purposes
+networkSimplex.initLowLimValues = initLowLimValues;
+networkSimplex.initCutValues = initCutValues;
+networkSimplex.calcCutValue = calcCutValue;
+networkSimplex.leaveEdge = leaveEdge;
+networkSimplex.enterEdge = enterEdge;
+networkSimplex.exchangeEdges = exchangeEdges;
+
+/*
+ * The network simplex algorithm assigns ranks to each node in the input graph
+ * and iteratively improves the ranking to reduce the length of edges.
+ *
+ * Preconditions:
+ *
+ *    1. The input graph must be a DAG.
+ *    2. All nodes in the graph must have an object value.
+ *    3. All edges in the graph must have "minlen" and "weight" attributes.
+ *
+ * Postconditions:
+ *
+ *    1. All nodes in the graph will have an assigned "rank" attribute that has
+ *       been optimized by the network simplex algorithm. Ranks start at 0.
+ *
+ *
+ * A rough sketch of the algorithm is as follows:
+ *
+ *    1. Assign initial ranks to each node. We use the longest path algorithm,
+ *       which assigns ranks to the lowest position possible. In general this
+ *       leads to very wide bottom ranks and unnecessarily long edges.
+ *    2. Construct a feasible tight tree. A tight tree is one such that all
+ *       edges in the tree have no slack (difference between length of edge
+ *       and minlen for the edge). This by itself greatly improves the assigned
+ *       rankings by shorting edges.
+ *    3. Iteratively find edges that have negative cut values. Generally a
+ *       negative cut value indicates that the edge could be removed and a new
+ *       tree edge could be added to produce a more compact graph.
+ *
+ * Much of the algorithms here are derived from Gansner, et al., "A Technique
+ * for Drawing Directed Graphs." The structure of the file roughly follows the
+ * structure of the overall algorithm.
+ */
+function networkSimplex(g) {
+  g = simplify(g);
+  initRank(g);
+  var t = feasibleTree(g);
+  initLowLimValues(t);
+  initCutValues(t, g);
+
+  var e, f;
+  while ((e = leaveEdge(t))) {
+    f = enterEdge(t, g, e);
+    exchangeEdges(t, g, e, f);
+  }
+}
+
+/*
+ * Initializes cut values for all edges in the tree.
+ */
+function initCutValues(t, g) {
+  var vs = postorder(t, t.nodes());
+  vs = vs.slice(0, vs.length - 1);
+  _.each(vs, function(v) {
+    assignCutValue(t, g, v);
+  });
+}
+
+function assignCutValue(t, g, child) {
+  var childLab = t.node(child),
+      parent = childLab.parent;
+  t.edge(child, parent).cutvalue = calcCutValue(t, g, child);
+}
+
+/*
+ * Given the tight tree, its graph, and a child in the graph calculate and
+ * return the cut value for the edge between the child and its parent.
+ */
+function calcCutValue(t, g, child) {
+  var childLab = t.node(child),
+      parent = childLab.parent,
+      // True if the child is on the tail end of the edge in the directed graph
+      childIsTail = true,
+      // The graph's view of the tree edge we're inspecting
+      graphEdge = g.edge(child, parent),
+      // The accumulated cut value for the edge between this node and its parent
+      cutValue = 0;
+
+  if (!graphEdge) {
+    childIsTail = false;
+    graphEdge = g.edge(parent, child);
+  }
+
+  cutValue = graphEdge.weight;
+
+  _.each(g.nodeEdges(child), function(e) {
+    var isOutEdge = e.v === child,
+        other = isOutEdge ? e.w : e.v;
+
+    if (other !== parent) {
+      var pointsToHead = isOutEdge === childIsTail,
+          otherWeight = g.edge(e).weight;
+
+      cutValue += pointsToHead ? otherWeight : -otherWeight;
+      if (isTreeEdge(t, child, other)) {
+        var otherCutValue = t.edge(child, other).cutvalue;
+        cutValue += pointsToHead ? -otherCutValue : otherCutValue;
+      }
+    }
+  });
+
+  return cutValue;
+}
+
+function initLowLimValues(tree, root) {
+  if (arguments.length < 2) {
+    root = tree.nodes()[0];
+  }
+  dfsAssignLowLim(tree, {}, 1, root);
+}
+
+function dfsAssignLowLim(tree, visited, nextLim, v, parent) {
+  var low = nextLim,
+      label = tree.node(v);
+
+  visited[v] = true;
+  _.each(tree.neighbors(v), function(w) {
+    if (!_.has(visited, w)) {
+      nextLim = dfsAssignLowLim(tree, visited, nextLim, w, v);
+    }
+  });
+
+  label.low = low;
+  label.lim = nextLim++;
+  if (parent) {
+    label.parent = parent;
+  } else {
+    // TODO should be able to remove this when we incrementally update low lim
+    delete label.parent;
+  }
+
+  return nextLim;
+}
+
+function leaveEdge(tree) {
+  return _.find(tree.edges(), function(e) {
+    return tree.edge(e).cutvalue < 0;
+  });
+}
+
+function enterEdge(t, g, edge) {
+  var v = edge.v,
+      w = edge.w;
+
+  // For the rest of this function we assume that v is the tail and w is the
+  // head, so if we don't have this edge in the graph we should flip it to
+  // match the correct orientation.
+  if (!g.hasEdge(v, w)) {
+    v = edge.w;
+    w = edge.v;
+  }
+
+  var vLabel = t.node(v),
+      wLabel = t.node(w),
+      tailLabel = vLabel,
+      flip = false;
+
+  // If the root is in the tail of the edge then we need to flip the logic that
+  // checks for the head and tail nodes in the candidates function below.
+  if (vLabel.lim > wLabel.lim) {
+    tailLabel = wLabel;
+    flip = true;
+  }
+
+  var candidates = _.filter(g.edges(), function(edge) {
+    return flip === isDescendant(t, t.node(edge.v), tailLabel) &&
+           flip !== isDescendant(t, t.node(edge.w), tailLabel);
+  });
+
+  return _.min(candidates, function(edge) { return slack(g, edge); });
+}
+
+function exchangeEdges(t, g, e, f) {
+  var v = e.v,
+      w = e.w;
+  t.removeEdge(v, w);
+  t.setEdge(f.v, f.w, {});
+  initLowLimValues(t);
+  initCutValues(t, g);
+  updateRanks(t, g);
+}
+
+function updateRanks(t, g) {
+  var root = _.find(t.nodes(), function(v) { return !g.node(v).parent; }),
+      vs = preorder(t, root);
+  vs = vs.slice(1);
+  _.each(vs, function(v) {
+    var parent = t.node(v).parent,
+        edge = g.edge(v, parent),
+        flipped = false;
+
+    if (!edge) {
+      edge = g.edge(parent, v);
+      flipped = true;
+    }
+
+    g.node(v).rank = g.node(parent).rank + (flipped ? edge.minlen : -edge.minlen);
+  });
+}
+
+/*
+ * Returns true if the edge is in the tree.
+ */
+function isTreeEdge(tree, u, v) {
+  return tree.hasEdge(u, v);
+}
+
+/*
+ * Returns true if the specified node is descendant of the root node per the
+ * assigned low and lim attributes in the tree.
+ */
+function isDescendant(tree, vLabel, rootLabel) {
+  return rootLabel.low <= vLabel.lim && vLabel.lim <= rootLabel.lim;
+}
+
+},{"../graphlib":7,"../lodash":10,"../util":29,"./feasible-tree":25,"./util":28}],28:[function(require,module,exports){
+"use strict";
+
+var _ = require("../lodash");
+
+module.exports = {
+  longestPath: longestPath,
+  slack: slack
+};
+
+/*
+ * Initializes ranks for the input graph using the longest path algorithm. This
+ * algorithm scales well and is fast in practice, it yields rather poor
+ * solutions. Nodes are pushed to the lowest layer possible, leaving the bottom
+ * ranks wide and leaving edges longer than necessary. However, due to its
+ * speed, this algorithm is good for getting an initial ranking that can be fed
+ * into other algorithms.
+ *
+ * This algorithm does not normalize layers because it will be used by other
+ * algorithms in most cases. If using this algorithm directly, be sure to
+ * run normalize at the end.
+ *
+ * Pre-conditions:
+ *
+ *    1. Input graph is a DAG.
+ *    2. Input graph node labels can be assigned properties.
+ *
+ * Post-conditions:
+ *
+ *    1. Each node will be assign an (unnormalized) "rank" property.
+ */
+function longestPath(g) {
+  var visited = {};
+
+  function dfs(v) {
+    var label = g.node(v);
+    if (_.has(visited, v)) {
+      return label.rank;
+    }
+    visited[v] = true;
+
+    var rank = _.min(_.map(g.outEdges(v), function(e) {
+      return dfs(e.w) - g.edge(e).minlen;
+    }));
+
+    if (rank === Number.POSITIVE_INFINITY) {
+      rank = 0;
+    }
+
+    return (label.rank = rank);
+  }
+
+  _.each(g.sources(), dfs);
+}
+
+/*
+ * Returns the amount of slack for the given edge. The slack is defined as the
+ * difference between the length of the edge and its minimum length.
+ */
+function slack(g, e) {
+  return g.node(e.w).rank - g.node(e.v).rank - g.edge(e).minlen;
+}
+
+},{"../lodash":10}],29:[function(require,module,exports){
+"use strict";
+
+var _ = require("./lodash"),
+    Graph = require("./graphlib").Graph;
+
+module.exports = {
+  addDummyNode: addDummyNode,
+  simplify: simplify,
+  asNonCompoundGraph: asNonCompoundGraph,
+  successorWeights: successorWeights,
+  predecessorWeights: predecessorWeights,
+  intersectRect: intersectRect,
+  buildLayerMatrix: buildLayerMatrix,
+  normalizeRanks: normalizeRanks,
+  removeEmptyRanks: removeEmptyRanks,
+  addBorderNode: addBorderNode,
+  maxRank: maxRank,
+  partition: partition,
+  time: time,
+  notime: notime
+};
+
+/*
+ * Adds a dummy node to the graph and return v.
+ */
+function addDummyNode(g, type, attrs, name) {
+  var v;
+  do {
+    v = _.uniqueId(name);
+  } while (g.hasNode(v));
+
+  attrs.dummy = type;
+  g.setNode(v, attrs);
+  return v;
+}
+
+/*
+ * Returns a new graph with only simple edges. Handles aggregation of data
+ * associated with multi-edges.
+ */
+function simplify(g) {
+  var simplified = new Graph().setGraph(g.graph());
+  _.each(g.nodes(), function(v) { simplified.setNode(v, g.node(v)); });
+  _.each(g.edges(), function(e) {
+    var simpleLabel = simplified.edge(e.v, e.w) || { weight: 0, minlen: 1 },
+        label = g.edge(e);
+    simplified.setEdge(e.v, e.w, {
+      weight: simpleLabel.weight + label.weight,
+      minlen: Math.max(simpleLabel.minlen, label.minlen)
+    });
+  });
+  return simplified;
+}
+
+function asNonCompoundGraph(g) {
+  var simplified = new Graph({ multigraph: g.isMultigraph() }).setGraph(g.graph());
+  _.each(g.nodes(), function(v) {
+    if (!g.children(v).length) {
+      simplified.setNode(v, g.node(v));
+    }
+  });
+  _.each(g.edges(), function(e) {
+    simplified.setEdge(e, g.edge(e));
+  });
+  return simplified;
+}
+
+function successorWeights(g) {
+  var weightMap = _.map(g.nodes(), function(v) {
+    var sucs = {};
+    _.each(g.outEdges(v), function(e) {
+      sucs[e.w] = (sucs[e.w] || 0) + g.edge(e).weight;
+    });
+    return sucs;
+  });
+  return _.zipObject(g.nodes(), weightMap);
+}
+
+function predecessorWeights(g) {
+  var weightMap = _.map(g.nodes(), function(v) {
+    var preds = {};
+    _.each(g.inEdges(v), function(e) {
+      preds[e.v] = (preds[e.v] || 0) + g.edge(e).weight;
+    });
+    return preds;
+  });
+  return _.zipObject(g.nodes(), weightMap);
+}
+
+/*
+ * Finds where a line starting at point ({x, y}) would intersect a rectangle
+ * ({x, y, width, height}) if it were pointing at the rectangle's center.
+ */
+function intersectRect(rect, point) {
+  var x = rect.x;
+  var y = rect.y;
+
+  // Rectangle intersection algorithm from:
+  // http://math.stackexchange.com/questions/108113/find-edge-between-two-boxes
+  var dx = point.x - x;
+  var dy = point.y - y;
+  var w = rect.width / 2;
+  var h = rect.height / 2;
+
+  if (!dx && !dy) {
+    throw new Error("Not possible to find intersection inside of the rectangle");
+  }
+
+  var sx, sy;
+  if (Math.abs(dy) * w > Math.abs(dx) * h) {
+    // Intersection is top or bottom of rect.
+    if (dy < 0) {
+      h = -h;
+    }
+    sx = h * dx / dy;
+    sy = h;
+  } else {
+    // Intersection is left or right of rect.
+    if (dx < 0) {
+      w = -w;
+    }
+    sx = w;
+    sy = w * dy / dx;
+  }
+
+  return { x: x + sx, y: y + sy };
+}
+
+/*
+ * Given a DAG with each node assigned "rank" and "order" properties, this
+ * function will produce a matrix with the ids of each node.
+ */
+function buildLayerMatrix(g) {
+  var layering = _.map(_.range(maxRank(g) + 1), function() { return []; });
+  _.each(g.nodes(), function(v) {
+    var node = g.node(v),
+        rank = node.rank;
+    if (!_.isUndefined(rank)) {
+      layering[rank][node.order] = v;
+    }
+  });
+  return layering;
+}
+
+/*
+ * Adjusts the ranks for all nodes in the graph such that all nodes v have
+ * rank(v) >= 0 and at least one node w has rank(w) = 0.
+ */
+function normalizeRanks(g) {
+  var min = _.min(_.map(g.nodes(), function(v) { return g.node(v).rank; }));
+  _.each(g.nodes(), function(v) {
+    var node = g.node(v);
+    if (_.has(node, "rank")) {
+      node.rank -= min;
+    }
+  });
+}
+
+function removeEmptyRanks(g) {
+  // Ranks may not start at 0, so we need to offset them
+  var offset = _.min(_.map(g.nodes(), function(v) { return g.node(v).rank; }));
+
+  var layers = [];
+  _.each(g.nodes(), function(v) {
+    var rank = g.node(v).rank - offset;
+    if (!_.has(layers, rank)) {
+      layers[rank] = [];
+    }
+    layers[rank].push(v);
+  });
+
+  var delta = 0,
+      nodeRankFactor = g.graph().nodeRankFactor;
+  _.each(layers, function(vs, i) {
+    if (_.isUndefined(vs) && i % nodeRankFactor !== 0) {
+      --delta;
+    } else if (delta) {
+      _.each(vs, function(v) { g.node(v).rank += delta; });
+    }
+  });
+}
+
+function addBorderNode(g, prefix, rank, order) {
+  var node = {
+    width: 0,
+    height: 0
+  };
+  if (arguments.length >= 4) {
+    node.rank = rank;
+    node.order = order;
+  }
+  return addDummyNode(g, "border", node, prefix);
+}
+
+function maxRank(g) {
+  return _.max(_.map(g.nodes(), function(v) {
+    var rank = g.node(v).rank;
+    if (!_.isUndefined(rank)) {
+      return rank;
+    }
+  }));
+}
+
+/*
+ * Partition a collection into two groups: `lhs` and `rhs`. If the supplied
+ * function returns true for an entry it goes into `lhs`. Otherwise it goes
+ * into `rhs.
+ */
+function partition(collection, fn) {
+  var result = { lhs: [], rhs: [] };
+  _.each(collection, function(value) {
+    if (fn(value)) {
+      result.lhs.push(value);
+    } else {
+      result.rhs.push(value);
+    }
+  });
+  return result;
+}
+
+/*
+ * Returns a new function that wraps `fn` with a timer. The wrapper logs the
+ * time it takes to execute the function.
+ */
+function time(name, fn) {
+  var start = _.now();
+  try {
+    return fn();
+  } finally {
+    console.log(name + " time: " + (_.now() - start) + "ms");
+  }
+}
+
+function notime(name, fn) {
+  return fn();
+}
+
+},{"./graphlib":7,"./lodash":10}],30:[function(require,module,exports){
+module.exports = "0.7.1";
+
+},{}],31:[function(require,module,exports){
+/**
+ * Copyright (c) 2014, Chris Pettitt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ * may be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+var lib = require("./lib");
+
+module.exports = {
+  Graph: lib.Graph,
+  json: require("./lib/json"),
+  alg: require("./lib/alg"),
+  version: lib.version
+};
+
+},{"./lib":47,"./lib/alg":38,"./lib/json":48}],32:[function(require,module,exports){
+var _ = require("../lodash");
+
+module.exports = components;
+
+function components(g) {
+  var visited = {},
+      cmpts = [],
+      cmpt;
+
+  function dfs(v) {
+    if (_.has(visited, v)) return;
+    visited[v] = true;
+    cmpt.push(v);
+    _.each(g.successors(v), dfs);
+    _.each(g.predecessors(v), dfs);
+  }
+
+  _.each(g.nodes(), function(v) {
+    cmpt = [];
+    dfs(v);
+    if (cmpt.length) {
+      cmpts.push(cmpt);
+    }
+  });
+
+  return cmpts;
+}
+
+},{"../lodash":49}],33:[function(require,module,exports){
+var _ = require("../lodash");
+
+module.exports = dfs;
+
+/*
+ * A helper that preforms a pre- or post-order traversal on the input graph
+ * and returns the nodes in the order they were visited. This algorithm treats
+ * the input as undirected.
+ *
+ * Order must be one of "pre" or "post".
+ */
+function dfs(g, vs, order) {
+  if (!_.isArray(vs)) {
+    vs = [vs];
+  }
+
+  var acc = [],
+      visited = {};
+  _.each(vs, function(v) {
+    if (!g.hasNode(v)) {
+      throw new Error("Graph does not have node: " + v);
+    }
+
+    doDfs(g, v, order === "post", visited, acc);
+  });
+  return acc;
+}
+
+function doDfs(g, v, postorder, visited, acc) {
+  if (!_.has(visited, v)) {
+    visited[v] = true;
+
+    if (!postorder) { acc.push(v); }
+    _.each(g.neighbors(v), function(w) {
+      doDfs(g, w, postorder, visited, acc);
+    });
+    if (postorder) { acc.push(v); }
+  }
+}
+
+},{"../lodash":49}],34:[function(require,module,exports){
+var dijkstra = require("./dijkstra"),
+    _ = require("../lodash");
+
+module.exports = dijkstraAll;
+
+function dijkstraAll(g, weightFunc, edgeFunc) {
+  return _.transform(g.nodes(), function(acc, v) {
+    acc[v] = dijkstra(g, v, weightFunc, edgeFunc);
+  }, {});
+}
+
+},{"../lodash":49,"./dijkstra":35}],35:[function(require,module,exports){
+var _ = require("../lodash"),
+    PriorityQueue = require("../data/priority-queue");
+
+module.exports = dijkstra;
+
+var DEFAULT_WEIGHT_FUNC = _.constant(1);
+
+function dijkstra(g, source, weightFn, edgeFn) {
+  return runDijkstra(g, String(source),
+                     weightFn || DEFAULT_WEIGHT_FUNC,
+                     edgeFn || function(v) { return g.outEdges(v); });
+}
+
+function runDijkstra(g, source, weightFn, edgeFn) {
+  var results = {},
+      pq = new PriorityQueue(),
+      v, vEntry;
+
+  var updateNeighbors = function(edge) {
+    var w = edge.v !== v ? edge.v : edge.w,
+        wEntry = results[w],
+        weight = weightFn(edge),
+        distance = vEntry.distance + weight;
+
+    if (weight < 0) {
+      throw new Error("dijkstra does not allow negative edge weights. " +
+                      "Bad edge: " + edge + " Weight: " + weight);
+    }
+
+    if (distance < wEntry.distance) {
+      wEntry.distance = distance;
+      wEntry.predecessor = v;
+      pq.decrease(w, distance);
+    }
+  };
+
+  g.nodes().forEach(function(v) {
+    var distance = v === source ? 0 : Number.POSITIVE_INFINITY;
+    results[v] = { distance: distance };
+    pq.add(v, distance);
+  });
+
+  while (pq.size() > 0) {
+    v = pq.removeMin();
+    vEntry = results[v];
+    if (vEntry.distance === Number.POSITIVE_INFINITY) {
+      break;
+    }
+
+    edgeFn(v).forEach(updateNeighbors);
+  }
+
+  return results;
+}
+
+},{"../data/priority-queue":45,"../lodash":49}],36:[function(require,module,exports){
+var _ = require("../lodash"),
+    tarjan = require("./tarjan");
+
+module.exports = findCycles;
+
+function findCycles(g) {
+  return _.filter(tarjan(g), function(cmpt) { return cmpt.length > 1; });
+}
+
+},{"../lodash":49,"./tarjan":43}],37:[function(require,module,exports){
+var _ = require("../lodash");
+
+module.exports = floydWarshall;
+
+var DEFAULT_WEIGHT_FUNC = _.constant(1);
+
+function floydWarshall(g, weightFn, edgeFn) {
+  return runFloydWarshall(g,
+                          weightFn || DEFAULT_WEIGHT_FUNC,
+                          edgeFn || function(v) { return g.outEdges(v); });
+}
+
+function runFloydWarshall(g, weightFn, edgeFn) {
+  var results = {},
+      nodes = g.nodes();
+
+  nodes.forEach(function(v) {
+    results[v] = {};
+    results[v][v] = { distance: 0 };
+    nodes.forEach(function(w) {
+      if (v !== w) {
+        results[v][w] = { distance: Number.POSITIVE_INFINITY };
+      }
+    });
+    edgeFn(v).forEach(function(edge) {
+      var w = edge.v === v ? edge.w : edge.v,
+          d = weightFn(edge);
+      results[v][w] = { distance: d, predecessor: v };
+    });
+  });
+
+  nodes.forEach(function(k) {
+    var rowK = results[k];
+    nodes.forEach(function(i) {
+      var rowI = results[i];
+      nodes.forEach(function(j) {
+        var ik = rowI[k];
+        var kj = rowK[j];
+        var ij = rowI[j];
+        var altDistance = ik.distance + kj.distance;
+        if (altDistance < ij.distance) {
+          ij.distance = altDistance;
+          ij.predecessor = kj.predecessor;
+        }
+      });
+    });
+  });
+
+  return results;
+}
+
+},{"../lodash":49}],38:[function(require,module,exports){
+module.exports = {
+  components: require("./components"),
+  dijkstra: require("./dijkstra"),
+  dijkstraAll: require("./dijkstra-all"),
+  findCycles: require("./find-cycles"),
+  floydWarshall: require("./floyd-warshall"),
+  isAcyclic: require("./is-acyclic"),
+  postorder: require("./postorder"),
+  preorder: require("./preorder"),
+  prim: require("./prim"),
+  tarjan: require("./tarjan"),
+  topsort: require("./topsort")
+};
+
+},{"./components":32,"./dijkstra":35,"./dijkstra-all":34,"./find-cycles":36,"./floyd-warshall":37,"./is-acyclic":39,"./postorder":40,"./preorder":41,"./prim":42,"./tarjan":43,"./topsort":44}],39:[function(require,module,exports){
+var topsort = require("./topsort");
+
+module.exports = isAcyclic;
+
+function isAcyclic(g) {
+  try {
+    topsort(g);
+  } catch (e) {
+    if (e instanceof topsort.CycleException) {
+      return false;
+    }
+    throw e;
+  }
+  return true;
+}
+
+},{"./topsort":44}],40:[function(require,module,exports){
+var dfs = require("./dfs");
+
+module.exports = postorder;
+
+function postorder(g, vs) {
+  return dfs(g, vs, "post");
+}
+
+},{"./dfs":33}],41:[function(require,module,exports){
+var dfs = require("./dfs");
+
+module.exports = preorder;
+
+function preorder(g, vs) {
+  return dfs(g, vs, "pre");
+}
+
+},{"./dfs":33}],42:[function(require,module,exports){
+var _ = require("../lodash"),
+    Graph = require("../graph"),
+    PriorityQueue = require("../data/priority-queue");
+
+module.exports = prim;
+
+function prim(g, weightFunc) {
+  var result = new Graph(),
+      parents = {},
+      pq = new PriorityQueue(),
+      v;
+
+  function updateNeighbors(edge) {
+    var w = edge.v === v ? edge.w : edge.v,
+        pri = pq.priority(w);
+    if (pri !== undefined) {
+      var edgeWeight = weightFunc(edge);
+      if (edgeWeight < pri) {
+        parents[w] = v;
+        pq.decrease(w, edgeWeight);
+      }
+    }
+  }
+
+  if (g.nodeCount() === 0) {
+    return result;
+  }
+
+  _.each(g.nodes(), function(v) {
+    pq.add(v, Number.POSITIVE_INFINITY);
+    result.setNode(v);
+  });
+
+  // Start from an arbitrary node
+  pq.decrease(g.nodes()[0], 0);
+
+  var init = false;
+  while (pq.size() > 0) {
+    v = pq.removeMin();
+    if (_.has(parents, v)) {
+      result.setEdge(v, parents[v]);
+    } else if (init) {
+      throw new Error("Input graph is not connected: " + g);
+    } else {
+      init = true;
+    }
+
+    g.nodeEdges(v).forEach(updateNeighbors);
+  }
+
+  return result;
+}
+
+},{"../data/priority-queue":45,"../graph":46,"../lodash":49}],43:[function(require,module,exports){
+var _ = require("../lodash");
+
+module.exports = tarjan;
+
+function tarjan(g) {
+  var index = 0,
+      stack = [],
+      visited = {}, // node id -> { onStack, lowlink, index }
+      results = [];
+
+  function dfs(v) {
+    var entry = visited[v] = {
+      onStack: true,
+      lowlink: index,
+      index: index++
+    };
+    stack.push(v);
+
+    g.successors(v).forEach(function(w) {
+      if (!_.has(visited, w)) {
+        dfs(w);
+        entry.lowlink = Math.min(entry.lowlink, visited[w].lowlink);
+      } else if (visited[w].onStack) {
+        entry.lowlink = Math.min(entry.lowlink, visited[w].index);
+      }
+    });
+
+    if (entry.lowlink === entry.index) {
+      var cmpt = [],
+          w;
+      do {
+        w = stack.pop();
+        visited[w].onStack = false;
+        cmpt.push(w);
+      } while (v !== w);
+      results.push(cmpt);
+    }
+  }
+
+  g.nodes().forEach(function(v) {
+    if (!_.has(visited, v)) {
+      dfs(v);
+    }
+  });
+
+  return results;
+}
+
+},{"../lodash":49}],44:[function(require,module,exports){
+var _ = require("../lodash");
+
+module.exports = topsort;
+topsort.CycleException = CycleException;
+
+function topsort(g) {
+  var visited = {},
+      stack = {},
+      results = [];
+
+  function visit(node) {
+    if (_.has(stack, node)) {
+      throw new CycleException();
+    }
+
+    if (!_.has(visited, node)) {
+      stack[node] = true;
+      visited[node] = true;
+      _.each(g.predecessors(node), visit);
+      delete stack[node];
+      results.push(node);
+    }
+  }
+
+  _.each(g.sinks(), visit);
+
+  if (_.size(visited) !== g.nodeCount()) {
+    throw new CycleException();
+  }
+
+  return results;
+}
+
+function CycleException() {}
+
+},{"../lodash":49}],45:[function(require,module,exports){
+var _ = require("../lodash");
+
+module.exports = PriorityQueue;
+
+/**
+ * A min-priority queue data structure. This algorithm is derived from Cormen,
+ * et al., "Introduction to Algorithms". The basic idea of a min-priority
+ * queue is that you can efficiently (in O(1) time) get the smallest key in
+ * the queue. Adding and removing elements takes O(log n) time. A key can
+ * have its priority decreased in O(log n) time.
+ */
+function PriorityQueue() {
+  this._arr = [];
+  this._keyIndices = {};
+}
+
+/**
+ * Returns the number of elements in the queue. Takes `O(1)` time.
+ */
+PriorityQueue.prototype.size = function() {
+  return this._arr.length;
+};
+
+/**
+ * Returns the keys that are in the queue. Takes `O(n)` time.
+ */
+PriorityQueue.prototype.keys = function() {
+  return this._arr.map(function(x) { return x.key; });
+};
+
+/**
+ * Returns `true` if **key** is in the queue and `false` if not.
+ */
+PriorityQueue.prototype.has = function(key) {
+  return _.has(this._keyIndices, key);
+};
+
+/**
+ * Returns the priority for **key**. If **key** is not present in the queue
+ * then this function returns `undefined`. Takes `O(1)` time.
+ *
+ * @param {Object} key
+ */
+PriorityQueue.prototype.priority = function(key) {
+  var index = this._keyIndices[key];
+  if (index !== undefined) {
+    return this._arr[index].priority;
+  }
+};
+
+/**
+ * Returns the key for the minimum element in this queue. If the queue is
+ * empty this function throws an Error. Takes `O(1)` time.
+ */
+PriorityQueue.prototype.min = function() {
+  if (this.size() === 0) {
+    throw new Error("Queue underflow");
+  }
+  return this._arr[0].key;
+};
+
+/**
+ * Inserts a new key into the priority queue. If the key already exists in
+ * the queue this function returns `false`; otherwise it will return `true`.
+ * Takes `O(n)` time.
+ *
+ * @param {Object} key the key to add
+ * @param {Number} priority the initial priority for the key
+ */
+PriorityQueue.prototype.add = function(key, priority) {
+  var keyIndices = this._keyIndices;
+  key = String(key);
+  if (!_.has(keyIndices, key)) {
+    var arr = this._arr;
+    var index = arr.length;
+    keyIndices[key] = index;
+    arr.push({key: key, priority: priority});
+    this._decrease(index);
+    return true;
+  }
+  return false;
+};
+
+/**
+ * Removes and returns the smallest key in the queue. Takes `O(log n)` time.
+ */
+PriorityQueue.prototype.removeMin = function() {
+  this._swap(0, this._arr.length - 1);
+  var min = this._arr.pop();
+  delete this._keyIndices[min.key];
+  this._heapify(0);
+  return min.key;
+};
+
+/**
+ * Decreases the priority for **key** to **priority**. If the new priority is
+ * greater than the previous priority, this function will throw an Error.
+ *
+ * @param {Object} key the key for which to raise priority
+ * @param {Number} priority the new priority for the key
+ */
+PriorityQueue.prototype.decrease = function(key, priority) {
+  var index = this._keyIndices[key];
+  if (priority > this._arr[index].priority) {
+    throw new Error("New priority is greater than current priority. " +
+        "Key: " + key + " Old: " + this._arr[index].priority + " New: " + priority);
+  }
+  this._arr[index].priority = priority;
+  this._decrease(index);
+};
+
+PriorityQueue.prototype._heapify = function(i) {
+  var arr = this._arr;
+  var l = 2 * i,
+      r = l + 1,
+      largest = i;
+  if (l < arr.length) {
+    largest = arr[l].priority < arr[largest].priority ? l : largest;
+    if (r < arr.length) {
+      largest = arr[r].priority < arr[largest].priority ? r : largest;
+    }
+    if (largest !== i) {
+      this._swap(i, largest);
+      this._heapify(largest);
+    }
+  }
+};
+
+PriorityQueue.prototype._decrease = function(index) {
+  var arr = this._arr;
+  var priority = arr[index].priority;
+  var parent;
+  while (index !== 0) {
+    parent = index >> 1;
+    if (arr[parent].priority < priority) {
+      break;
+    }
+    this._swap(index, parent);
+    index = parent;
+  }
+};
+
+PriorityQueue.prototype._swap = function(i, j) {
+  var arr = this._arr;
+  var keyIndices = this._keyIndices;
+  var origArrI = arr[i];
+  var origArrJ = arr[j];
+  arr[i] = origArrJ;
+  arr[j] = origArrI;
+  keyIndices[origArrJ.key] = i;
+  keyIndices[origArrI.key] = j;
+};
+
+},{"../lodash":49}],46:[function(require,module,exports){
+"use strict";
+
+var _ = require("./lodash");
+
+module.exports = Graph;
+
+var DEFAULT_EDGE_NAME = "\x00",
+    GRAPH_NODE = "\x00",
+    EDGE_KEY_DELIM = "\x01";
+
+// Implementation notes:
+//
+//  * Node id query functions should return string ids for the nodes
+//  * Edge id query functions should return an "edgeObj", edge object, that is
+//    composed of enough information to uniquely identify an edge: {v, w, name}.
+//  * Internally we use an "edgeId", a stringified form of the edgeObj, to
+//    reference edges. This is because we need a performant way to look these
+//    edges up and, object properties, which have string keys, are the closest
+//    we're going to get to a performant hashtable in JavaScript.
+
+function Graph(opts) {
+  this._isDirected = _.has(opts, "directed") ? opts.directed : true;
+  this._isMultigraph = _.has(opts, "multigraph") ? opts.multigraph : false;
+  this._isCompound = _.has(opts, "compound") ? opts.compound : false;
+
+  // Label for the graph itself
+  this._label = undefined;
+
+  // Defaults to be set when creating a new node
+  this._defaultNodeLabelFn = _.constant(undefined);
+
+  // Defaults to be set when creating a new edge
+  this._defaultEdgeLabelFn = _.constant(undefined);
+
+  // v -> label
+  this._nodes = {};
+
+  if (this._isCompound) {
+    // v -> parent
+    this._parent = {};
+
+    // v -> children
+    this._children = {};
+    this._children[GRAPH_NODE] = {};
+  }
+
+  // v -> edgeObj
+  this._in = {};
+
+  // u -> v -> Number
+  this._preds = {};
+
+  // v -> edgeObj
+  this._out = {};
+
+  // v -> w -> Number
+  this._sucs = {};
+
+  // e -> edgeObj
+  this._edgeObjs = {};
+
+  // e -> label
+  this._edgeLabels = {};
+}
+
+/* Number of nodes in the graph. Should only be changed by the implementation. */
+Graph.prototype._nodeCount = 0;
+
+/* Number of edges in the graph. Should only be changed by the implementation. */
+Graph.prototype._edgeCount = 0;
+
+
+/* === Graph functions ========= */
+
+Graph.prototype.isDirected = function() {
+  return this._isDirected;
+};
+
+Graph.prototype.isMultigraph = function() {
+  return this._isMultigraph;
+};
+
+Graph.prototype.isCompound = function() {
+  return this._isCompound;
+};
+
+Graph.prototype.setGraph = function(label) {
+  this._label = label;
+  return this;
+};
+
+Graph.prototype.graph = function() {
+  return this._label;
+};
+
+
+/* === Node functions ========== */
+
+Graph.prototype.setDefaultNodeLabel = function(newDefault) {
+  if (!_.isFunction(newDefault)) {
+    newDefault = _.constant(newDefault);
+  }
+  this._defaultNodeLabelFn = newDefault;
+  return this;
+};
+
+Graph.prototype.nodeCount = function() {
+  return this._nodeCount;
+};
+
+Graph.prototype.nodes = function() {
+  return _.keys(this._nodes);
+};
+
+Graph.prototype.sources = function() {
+  return _.filter(this.nodes(), function(v) {
+    return _.isEmpty(this._in[v]);
+  }, this);
+};
+
+Graph.prototype.sinks = function() {
+  return _.filter(this.nodes(), function(v) {
+    return _.isEmpty(this._out[v]);
+  }, this);
+};
+
+Graph.prototype.setNodes = function(vs, value) {
+  var args = arguments;
+  _.each(vs, function(v) {
+    if (args.length > 1) {
+      this.setNode(v, value);
+    } else {
+      this.setNode(v);
+    }
+  }, this);
+  return this;
+};
+
+Graph.prototype.setNode = function(v, value) {
+  if (_.has(this._nodes, v)) {
+    if (arguments.length > 1) {
+      this._nodes[v] = value;
+    }
+    return this;
+  }
+
+  this._nodes[v] = arguments.length > 1 ? value : this._defaultNodeLabelFn(v);
+  if (this._isCompound) {
+    this._parent[v] = GRAPH_NODE;
+    this._children[v] = {};
+    this._children[GRAPH_NODE][v] = true;
+  }
+  this._in[v] = {};
+  this._preds[v] = {};
+  this._out[v] = {};
+  this._sucs[v] = {};
+  ++this._nodeCount;
+  return this;
+};
+
+Graph.prototype.node = function(v) {
+  return this._nodes[v];
+};
+
+Graph.prototype.hasNode = function(v) {
+  return _.has(this._nodes, v);
+};
+
+Graph.prototype.removeNode =  function(v) {
+  var self = this;
+  if (_.has(this._nodes, v)) {
+    var removeEdge = function(e) { self.removeEdge(self._edgeObjs[e]); };
+    delete this._nodes[v];
+    if (this._isCompound) {
+      this._removeFromParentsChildList(v);
+      delete this._parent[v];
+      _.each(this.children(v), function(child) {
+        this.setParent(child);
+      }, this);
+      delete this._children[v];
+    }
+    _.each(_.keys(this._in[v]), removeEdge);
+    delete this._in[v];
+    delete this._preds[v];
+    _.each(_.keys(this._out[v]), removeEdge);
+    delete this._out[v];
+    delete this._sucs[v];
+    --this._nodeCount;
+  }
+  return this;
+};
+
+Graph.prototype.setParent = function(v, parent) {
+  if (!this._isCompound) {
+    throw new Error("Cannot set parent in a non-compound graph");
+  }
+
+  if (_.isUndefined(parent)) {
+    parent = GRAPH_NODE;
+  } else {
+    for (var ancestor = parent;
+         !_.isUndefined(ancestor);
+         ancestor = this.parent(ancestor)) {
+      if (ancestor === v) {
+        throw new Error("Setting " + parent+ " as parent of " + v +
+                        " would create create a cycle");
+      }
+    }
+
+    this.setNode(parent);
+  }
+
+  this.setNode(v);
+  this._removeFromParentsChildList(v);
+  this._parent[v] = parent;
+  this._children[parent][v] = true;
+  return this;
+};
+
+Graph.prototype._removeFromParentsChildList = function(v) {
+  delete this._children[this._parent[v]][v];
+};
+
+Graph.prototype.parent = function(v) {
+  if (this._isCompound) {
+    var parent = this._parent[v];
+    if (parent !== GRAPH_NODE) {
+      return parent;
+    }
+  }
+};
+
+Graph.prototype.children = function(v) {
+  if (_.isUndefined(v)) {
+    v = GRAPH_NODE;
+  }
+
+  if (this._isCompound) {
+    var children = this._children[v];
+    if (children) {
+      return _.keys(children);
+    }
+  } else if (v === GRAPH_NODE) {
+    return this.nodes();
+  } else if (this.hasNode(v)) {
+    return [];
+  }
+};
+
+Graph.prototype.predecessors = function(v) {
+  var predsV = this._preds[v];
+  if (predsV) {
+    return _.keys(predsV);
+  }
+};
+
+Graph.prototype.successors = function(v) {
+  var sucsV = this._sucs[v];
+  if (sucsV) {
+    return _.keys(sucsV);
+  }
+};
+
+Graph.prototype.neighbors = function(v) {
+  var preds = this.predecessors(v);
+  if (preds) {
+    return _.union(preds, this.successors(v));
+  }
+};
+
+/* === Edge functions ========== */
+
+Graph.prototype.setDefaultEdgeLabel = function(newDefault) {
+  if (!_.isFunction(newDefault)) {
+    newDefault = _.constant(newDefault);
+  }
+  this._defaultEdgeLabelFn = newDefault;
+  return this;
+};
+
+Graph.prototype.edgeCount = function() {
+  return this._edgeCount;
+};
+
+Graph.prototype.edges = function() {
+  return _.values(this._edgeObjs);
+};
+
+Graph.prototype.setPath = function(vs, value) {
+  var self = this,
+      args = arguments;
+  _.reduce(vs, function(v, w) {
+    if (args.length > 1) {
+      self.setEdge(v, w, value);
+    } else {
+      self.setEdge(v, w);
+    }
+    return w;
+  });
+  return this;
+};
+
+/*
+ * setEdge(v, w, [value, [name]])
+ * setEdge({ v, w, [name] }, [value])
+ */
+Graph.prototype.setEdge = function() {
+  var v, w, name, value,
+      valueSpecified = false;
+
+  if (_.isPlainObject(arguments[0])) {
+    v = arguments[0].v;
+    w = arguments[0].w;
+    name = arguments[0].name;
+    if (arguments.length === 2) {
+      value = arguments[1];
+      valueSpecified = true;
+    }
+  } else {
+    v = arguments[0];
+    w = arguments[1];
+    name = arguments[3];
+    if (arguments.length > 2) {
+      value = arguments[2];
+      valueSpecified = true;
+    }
+  }
+
+  v = "" + v;
+  w = "" + w;
+  if (!_.isUndefined(name)) {
+    name = "" + name;
+  }
+
+  var e = edgeArgsToId(this._isDirected, v, w, name);
+  if (_.has(this._edgeLabels, e)) {
+    if (valueSpecified) {
+      this._edgeLabels[e] = value;
+    }
+    return this;
+  }
+
+  if (!_.isUndefined(name) && !this._isMultigraph) {
+    throw new Error("Cannot set a named edge when isMultigraph = false");
+  }
+
+  // It didn't exist, so we need to create it.
+  // First ensure the nodes exist.
+  this.setNode(v);
+  this.setNode(w);
+
+  this._edgeLabels[e] = valueSpecified ? value : this._defaultEdgeLabelFn(v, w, name);
+
+  var edgeObj = edgeArgsToObj(this._isDirected, v, w, name);
+  // Ensure we add undirected edges in a consistent way.
+  v = edgeObj.v;
+  w = edgeObj.w;
+
+  Object.freeze(edgeObj);
+  this._edgeObjs[e] = edgeObj;
+  incrementOrInitEntry(this._preds[w], v);
+  incrementOrInitEntry(this._sucs[v], w);
+  this._in[w][e] = edgeObj;
+  this._out[v][e] = edgeObj;
+  this._edgeCount++;
+  return this;
+};
+
+Graph.prototype.edge = function(v, w, name) {
+  var e = (arguments.length === 1
+            ? edgeObjToId(this._isDirected, arguments[0])
+            : edgeArgsToId(this._isDirected, v, w, name));
+  return this._edgeLabels[e];
+};
+
+Graph.prototype.hasEdge = function(v, w, name) {
+  var e = (arguments.length === 1
+            ? edgeObjToId(this._isDirected, arguments[0])
+            : edgeArgsToId(this._isDirected, v, w, name));
+  return _.has(this._edgeLabels, e);
+};
+
+Graph.prototype.removeEdge = function(v, w, name) {
+  var e = (arguments.length === 1
+            ? edgeObjToId(this._isDirected, arguments[0])
+            : edgeArgsToId(this._isDirected, v, w, name)),
+      edge = this._edgeObjs[e];
+  if (edge) {
+    v = edge.v;
+    w = edge.w;
+    delete this._edgeLabels[e];
+    delete this._edgeObjs[e];
+    decrementOrRemoveEntry(this._preds[w], v);
+    decrementOrRemoveEntry(this._sucs[v], w);
+    delete this._in[w][e];
+    delete this._out[v][e];
+    this._edgeCount--;
+  }
+  return this;
+};
+
+Graph.prototype.inEdges = function(v, u) {
+  var inV = this._in[v];
+  if (inV) {
+    var edges = _.values(inV);
+    if (!u) {
+      return edges;
+    }
+    return _.filter(edges, function(edge) { return edge.v === u; });
+  }
+};
+
+Graph.prototype.outEdges = function(v, w) {
+  var outV = this._out[v];
+  if (outV) {
+    var edges = _.values(outV);
+    if (!w) {
+      return edges;
+    }
+    return _.filter(edges, function(edge) { return edge.w === w; });
+  }
+};
+
+Graph.prototype.nodeEdges = function(v, w) {
+  var inEdges = this.inEdges(v, w);
+  if (inEdges) {
+    return inEdges.concat(this.outEdges(v, w));
+  }
+};
+
+function incrementOrInitEntry(map, k) {
+  if (_.has(map, k)) {
+    map[k]++;
+  } else {
+    map[k] = 1;
+  }
+}
+
+function decrementOrRemoveEntry(map, k) {
+  if (!--map[k]) { delete map[k]; }
+}
+
+function edgeArgsToId(isDirected, v, w, name) {
+  if (!isDirected && v > w) {
+    var tmp = v;
+    v = w;
+    w = tmp;
+  }
+  return v + EDGE_KEY_DELIM + w + EDGE_KEY_DELIM +
+             (_.isUndefined(name) ? DEFAULT_EDGE_NAME : name);
+}
+
+function edgeArgsToObj(isDirected, v, w, name) {
+  if (!isDirected && v > w) {
+    var tmp = v;
+    v = w;
+    w = tmp;
+  }
+  var edgeObj =  { v: v, w: w };
+  if (name) {
+    edgeObj.name = name;
+  }
+  return edgeObj;
+}
+
+function edgeObjToId(isDirected, edgeObj) {
+  return edgeArgsToId(isDirected, edgeObj.v, edgeObj.w, edgeObj.name);
+}
+
+},{"./lodash":49}],47:[function(require,module,exports){
+// Includes only the "core" of graphlib
+module.exports = {
+  Graph: require("./graph"),
+  version: require("./version")
+};
+
+},{"./graph":46,"./version":50}],48:[function(require,module,exports){
+var _ = require("./lodash"),
+    Graph = require("./graph");
+
+module.exports = {
+  write: write,
+  read: read
+};
+
+function write(g) {
+  var json = {
+    options: {
+      directed: g.isDirected(),
+      multigraph: g.isMultigraph(),
+      compound: g.isCompound()
+    },
+    nodes: writeNodes(g),
+    edges: writeEdges(g)
+  };
+  if (!_.isUndefined(g.graph())) {
+    json.value = _.clone(g.graph());
+  }
+  return json;
+}
+
+function writeNodes(g) {
+  return _.map(g.nodes(), function(v) {
+    var nodeValue = g.node(v),
+        parent = g.parent(v),
+        node = { v: v };
+    if (!_.isUndefined(nodeValue)) {
+      node.value = nodeValue;
+    }
+    if (!_.isUndefined(parent)) {
+      node.parent = parent;
+    }
+    return node;
+  });
+}
+
+function writeEdges(g) {
+  return _.map(g.edges(), function(e) {
+    var edgeValue = g.edge(e),
+        edge = { v: e.v, w: e.w };
+    if (!_.isUndefined(e.name)) {
+      edge.name = e.name;
+    }
+    if (!_.isUndefined(edgeValue)) {
+      edge.value = edgeValue;
+    }
+    return edge;
+  });
+}
+
+function read(json) {
+  var g = new Graph(json.options).setGraph(json.value);
+  _.each(json.nodes, function(entry) {
+    g.setNode(entry.v, entry.value);
+    if (entry.parent) {
+      g.setParent(entry.v, entry.parent);
+    }
+  });
+  _.each(json.edges, function(entry) {
+    g.setEdge({ v: entry.v, w: entry.w, name: entry.name }, entry.value);
+  });
+  return g;
+}
+
+},{"./graph":46,"./lodash":49}],49:[function(require,module,exports){
+module.exports=require(10)
+},{"/Users/cpettitt/projects/dagre/lib/lodash.js":10,"lodash":51}],50:[function(require,module,exports){
+module.exports = '1.0.1';
+
+},{}],51:[function(require,module,exports){
+(function (global){
+/**
+ * @license
+ * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
+ * Build: `lodash modern -o ./dist/lodash.js`
+ * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
+ * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
+ * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ * Available under MIT license <http://lodash.com/license>
+ */
+;(function() {
+
+  /** Used as a safe reference for `undefined` in pre ES5 environments */
+  var undefined;
+
+  /** Used to pool arrays and objects used internally */
+  var arrayPool = [],
+      objectPool = [];
+
+  /** Used to generate unique IDs */
+  var idCounter = 0;
+
+  /** Used to prefix keys to avoid issues with `__proto__` and properties on `Object.prototype` */
+  var keyPrefix = +new Date + '';
+
+  /** Used as the size when optimizations are enabled for large arrays */
+  var largeArraySize = 75;
+
+  /** Used as the max size of the `arrayPool` and `objectPool` */
+  var maxPoolSize = 40;
+
+  /** Used to detect and test whitespace */
+  var whitespace = (
+    // whitespace
+    ' \t\x0B\f\xA0\ufeff' +
+
+    // line terminators
+    '\n\r\u2028\u2029' +
+
+    // unicode category "Zs" space separators
+    '\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000'
+  );
+
+  /** Used to match empty string literals in compiled template source */
+  var reEmptyStringLeading = /\b__p \+= '';/g,
+      reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
+      reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
+
+  /**
+   * Used to match ES6 template delimiters
+   * http://people.mozilla.org/~jorendorff/es6-draft.html#sec-literals-string-literals
+   */
+  var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
+
+  /** Used to match regexp flags from their coerced string values */
+  var reFlags = /\w*$/;
+
+  /** Used to detected named functions */
+  var reFuncName = /^\s*function[ \n\r\t]+\w/;
+
+  /** Used to match "interpolate" template delimiters */
+  var reInterpolate = /<%=([\s\S]+?)%>/g;
+
+  /** Used to match leading whitespace and zeros to be removed */
+  var reLeadingSpacesAndZeros = RegExp('^[' + whitespace + ']*0+(?=.$)');
+
+  /** Used to ensure capturing order of template delimiters */
+  var reNoMatch = /($^)/;
+
+  /** Used to detect functions containing a `this` reference */
+  var reThis = /\bthis\b/;
+
+  /** Used to match unescaped characters in compiled string literals */
+  var reUnescapedString = /['\n\r\t\u2028\u2029\\]/g;
+
+  /** Used to assign default `context` object properties */
+  var contextProps = [
+    'Array', 'Boolean', 'Date', 'Function', 'Math', 'Number', 'Object',
+    'RegExp', 'String', '_', 'attachEvent', 'clearTimeout', 'isFinite', 'isNaN',
+    'parseInt', 'setTimeout'
+  ];
+
+  /** Used to make template sourceURLs easier to identify */
+  var templateCounter = 0;
+
+  /** `Object#toString` result shortcuts */
+  var argsClass = '[object Arguments]',
+      arrayClass = '[object Array]',
+      boolClass = '[object Boolean]',
+      dateClass = '[object Date]',
+      funcClass = '[object Function]',
+      numberClass = '[object Number]',
+      objectClass = '[object Object]',
+      regexpClass = '[object RegExp]',
+      stringClass = '[object String]';
+
+  /** Used to identify object classifications that `_.clone` supports */
+  var cloneableClasses = {};
+  cloneableClasses[funcClass] = false;
+  cloneableClasses[argsClass] = cloneableClasses[arrayClass] =
+  cloneableClasses[boolClass] = cloneableClasses[dateClass] =
+  cloneableClasses[numberClass] = cloneableClasses[objectClass] =
+  cloneableClasses[regexpClass] = cloneableClasses[stringClass] = true;
+
+  /** Used as an internal `_.debounce` options object */
+  var debounceOptions = {
+    'leading': false,
+    'maxWait': 0,
+    'trailing': false
+  };
+
+  /** Used as the property descriptor for `__bindData__` */
+  var descriptor = {
+    'configurable': false,
+    'enumerable': false,
+    'value': null,
+    'writable': false
+  };
+
+  /** Used to determine if values are of the language type Object */
+  var objectTypes = {
+    'boolean': false,
+    'function': true,
+    'object': true,
+    'number': false,
+    'string': false,
+    'undefined': false
+  };
+
+  /** Used to escape characters for inclusion in compiled string literals */
+  var stringEscapes = {
+    '\\': '\\',
+    "'": "'",
+    '\n': 'n',
+    '\r': 'r',
+    '\t': 't',
+    '\u2028': 'u2028',
+    '\u2029': 'u2029'
+  };
+
+  /** Used as a reference to the global object */
+  var root = (objectTypes[typeof window] && window) || this;
+
+  /** Detect free variable `exports` */
+  var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;
+
+  /** Detect free variable `module` */
+  var freeModule = objectTypes[typeof module] && module && !module.nodeType && module;
+
+  /** Detect the popular CommonJS extension `module.exports` */
+  var moduleExports = freeModule && freeModule.exports === freeExports && freeExports;
+
+  /** Detect free variable `global` from Node.js or Browserified code and use it as `root` */
+  var freeGlobal = objectTypes[typeof global] && global;
+  if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) {
+    root = freeGlobal;
+  }
+
+  /*--------------------------------------------------------------------------*/
+
+  /**
+   * The base implementation of `_.indexOf` without support for binary searches
+   * or `fromIndex` constraints.
+   *
+   * @private
+   * @param {Array} array The array to search.
+   * @param {*} value The value to search for.
+   * @param {number} [fromIndex=0] The index to search from.
+   * @returns {number} Returns the index of the matched value or `-1`.
+   */
+  function baseIndexOf(array, value, fromIndex) {
+    var index = (fromIndex || 0) - 1,
+        length = array ? array.length : 0;
+
+    while (++index < length) {
+      if (array[index] === value) {
+        return index;
+      }
+    }
+    return -1;
+  }
+
+  /**
+   * An implementation of `_.contains` for cache objects that mimics the return
+   * signature of `_.indexOf` by returning `0` if the value is found, else `-1`.
+   *
+   * @private
+   * @param {Object} cache The cache object to inspect.
+   * @param {*} value The value to search for.
+   * @returns {number} Returns `0` if `value` is found, else `-1`.
+   */
+  function cacheIndexOf(cache, value) {
+    var type = typeof value;
+    cache = cache.cache;
+
+    if (type == 'boolean' || value == null) {
+      return cache[value] ? 0 : -1;
+    }
+    if (type != 'number' && type != 'string') {
+      type = 'object';
+    }
+    var key = type == 'number' ? value : keyPrefix + value;
+    cache = (cache = cache[type]) && cache[key];
+
+    return type == 'object'
+      ? (cache && baseIndexOf(cache, value) > -1 ? 0 : -1)
+      : (cache ? 0 : -1);
+  }
+
+  /**
+   * Adds a given value to the corresponding cache object.
+   *
+   * @private
+   * @param {*} value The value to add to the cache.
+   */
+  function cachePush(value) {
+    var cache = this.cache,
+        type = typeof value;
+
+    if (type == 'boolean' || value == null) {
+      cache[value] = true;
+    } else {
+      if (type != 'number' && type != 'string') {
+        type = 'object';
+      }
+      var key = type == 'number' ? value : keyPrefix + value,
+          typeCache = cache[type] || (cache[type] = {});
+
+      if (type == 'object') {
+        (typeCache[key] || (typeCache[key] = [])).push(value);
+      } else {
+        typeCache[key] = true;
+      }
+    }
+  }
+
+  /**
+   * Used by `_.max` and `_.min` as the default callback when a given
+   * collection is a string value.
+   *
+   * @private
+   * @param {string} value The character to inspect.
+   * @returns {number} Returns the code unit of given character.
+   */
+  function charAtCallback(value) {
+    return value.charCodeAt(0);
+  }
+
+  /**
+   * Used by `sortBy` to compare transformed `collection` elements, stable sorting
+   * them in ascending order.
+   *
+   * @private
+   * @param {Object} a The object to compare to `b`.
+   * @param {Object} b The object to compare to `a`.
+   * @returns {number} Returns the sort order indicator of `1` or `-1`.
+   */
+  function compareAscending(a, b) {
+    var ac = a.criteria,
+        bc = b.criteria,
+        index = -1,
+        length = ac.length;
+
+    while (++index < length) {
+      var value = ac[index],
+          other = bc[index];
+
+      if (value !== other) {
+        if (value > other || typeof value == 'undefined') {
+          return 1;
+        }
+        if (value < other || typeof other == 'undefined') {
+          return -1;
+        }
+      }
+    }
+    // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
+    // that causes it, under certain circumstances, to return the same value for
+    // `a` and `b`. See https://github.com/jashkenas/underscore/pull/1247
+    //
+    // This also ensures a stable sort in V8 and other engines.
+    // See http://code.google.com/p/v8/issues/detail?id=90
+    return a.index - b.index;
+  }
+
+  /**
+   * Creates a cache object to optimize linear searches of large arrays.
+   *
+   * @private
+   * @param {Array} [array=[]] The array to search.
+   * @returns {null|Object} Returns the cache object or `null` if caching should not be used.
+   */
+  function createCache(array) {
+    var index = -1,
+        length = array.length,
+        first = array[0],
+        mid = array[(length / 2) | 0],
+        last = array[length - 1];
+
+    if (first && typeof first == 'object' &&
+        mid && typeof mid == 'object' && last && typeof last == 'object') {
+      return false;
+    }
+    var cache = getObject();
+    cache['false'] = cache['null'] = cache['true'] = cache['undefined'] = false;
+
+    var result = getObject();
+    result.array = array;
+    result.cache = cache;
+    result.push = cachePush;
+
+    while (++index < length) {
+      result.push(array[index]);
+    }
+    return result;
+  }
+
+  /**
+   * Used by `template` to escape characters for inclusion in compiled
+   * string literals.
+   *
+   * @private
+   * @param {string} match The matched character to escape.
+   * @returns {string} Returns the escaped character.
+   */
+  function escapeStringChar(match) {
+    return '\\' + stringEscapes[match];
+  }
+
+  /**
+   * Gets an array from the array pool or creates a new one if the pool is empty.
+   *
+   * @private
+   * @returns {Array} The array from the pool.
+   */
+  function getArray() {
+    return arrayPool.pop() || [];
+  }
+
+  /**
+   * Gets an object from the object pool or creates a new one if the pool is empty.
+   *
+   * @private
+   * @returns {Object} The object from the pool.
+   */
+  function getObject() {
+    return objectPool.pop() || {
+      'array': null,
+      'cache': null,
+      'criteria': null,
+      'false': false,
+      'index': 0,
+      'null': false,
+      'number': null,
+      'object': null,
+      'push': null,
+      'string': null,
+      'true': false,
+      'undefined': false,
+      'value': null
+    };
+  }
+
+  /**
+   * Releases the given array back to the array pool.
+   *
+   * @private
+   * @param {Array} [array] The array to release.
+   */
+  function releaseArray(array) {
+    array.length = 0;
+    if (arrayPool.length < maxPoolSize) {
+      arrayPool.push(array);
+    }
+  }
+
+  /**
+   * Releases the given object back to the object pool.
+   *
+   * @private
+   * @param {Object} [object] The object to release.
+   */
+  function releaseObject(object) {
+    var cache = object.cache;
+    if (cache) {
+      releaseObject(cache);
+    }
+    object.array = object.cache = object.criteria = object.object = object.number = object.string = object.value = null;
+    if (objectPool.length < maxPoolSize) {
+      objectPool.push(object);
+    }
+  }
+
+  /**
+   * Slices the `collection` from the `start` index up to, but not including,
+   * the `end` index.
+   *
+   * Note: This function is used instead of `Array#slice` to support node lists
+   * in IE < 9 and to ensure dense arrays are returned.
+   *
+   * @private
+   * @param {Array|Object|string} collection The collection to slice.
+   * @param {number} start The start index.
+   * @param {number} end The end index.
+   * @returns {Array} Returns the new array.
+   */
+  function slice(array, start, end) {
+    start || (start = 0);
+    if (typeof end == 'undefined') {
+      end = array ? array.length : 0;
+    }
+    var index = -1,
+        length = end - start || 0,
+        result = Array(length < 0 ? 0 : length);
+
+    while (++index < length) {
+      result[index] = array[start + index];
+    }
+    return result;
+  }
+
+  /*--------------------------------------------------------------------------*/
+
+  /**
+   * Create a new `lodash` function using the given context object.
+   *
+   * @static
+   * @memberOf _
+   * @category Utilities
+   * @param {Object} [context=root] The context object.
+   * @returns {Function} Returns the `lodash` function.
+   */
+  function runInContext(context) {
+    // Avoid issues with some ES3 environments that attempt to use values, named
+    // after built-in constructors like `Object`, for the creation of literals.
+    // ES5 clears this up by stating that literals must use built-in constructors.
+    // See http://es5.github.io/#x11.1.5.
+    context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root;
+
+    /** Native constructor references */
+    var Array = context.Array,
+        Boolean = context.Boolean,
+        Date = context.Date,
+        Function = context.Function,
+        Math = context.Math,
+        Number = context.Number,
+        Object = context.Object,
+        RegExp = context.RegExp,
+        String = context.String,
+        TypeError = context.TypeError;
+
+    /**
+     * Used for `Array` method references.
+     *
+     * Normally `Array.prototype` would suffice, however, using an array literal
+     * avoids issues in Narwhal.
+     */
+    var arrayRef = [];
+
+    /** Used for native method references */
+    var objectProto = Object.prototype;
+
+    /** Used to restore the original `_` reference in `noConflict` */
+    var oldDash = context._;
+
+    /** Used to resolve the internal [[Class]] of values */
+    var toString = objectProto.toString;
+
+    /** Used to detect if a method is native */
+    var reNative = RegExp('^' +
+      String(toString)
+        .replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
+        .replace(/toString| for [^\]]+/g, '.*?') + '$'
+    );
+
+    /** Native method shortcuts */
+    var ceil = Math.ceil,
+        clearTimeout = context.clearTimeout,
+        floor = Math.floor,
+        fnToString = Function.prototype.toString,
+        getPrototypeOf = isNative(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf,
+        hasOwnProperty = objectProto.hasOwnProperty,
+        push = arrayRef.push,
+        setTimeout = context.setTimeout,
+        splice = arrayRef.splice,
+        unshift = arrayRef.unshift;
+
+    /** Used to set meta data on functions */
+    var defineProperty = (function() {
+      // IE 8 only accepts DOM elements
+      try {
+        var o = {},
+            func = isNative(func = Object.defineProperty) && func,
+            result = func(o, o, o) && func;
+      } catch(e) { }
+      return result;
+    }());
+
+    /* Native method shortcuts for methods with the same name as other `lodash` methods */
+    var nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate,
+        nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray,
+        nativeIsFinite = context.isFinite,
+        nativeIsNaN = context.isNaN,
+        nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys,
+        nativeMax = Math.max,
+        nativeMin = Math.min,
+        nativeParseInt = context.parseInt,
+        nativeRandom = Math.random;
+
+    /** Used to lookup a built-in constructor by [[Class]] */
+    var ctorByClass = {};
+    ctorByClass[arrayClass] = Array;
+    ctorByClass[boolClass] = Boolean;
+    ctorByClass[dateClass] = Date;
+    ctorByClass[funcClass] = Function;
+    ctorByClass[objectClass] = Object;
+    ctorByClass[numberClass] = Number;
+    ctorByClass[regexpClass] = RegExp;
+    ctorByClass[stringClass] = String;
+
+    /*--------------------------------------------------------------------------*/
+
+    /**
+     * Creates a `lodash` object which wraps the given value to enable intuitive
+     * method chaining.
+     *
+     * In addition to Lo-Dash methods, wrappers also have the following `Array` methods:
+     * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`,
+     * and `unshift`
+     *
+     * Chaining is supported in custom builds as long as the `value` method is
+     * implicitly or explicitly included in the build.
+     *
+     * The chainable wrapper functions are:
+     * `after`, `assign`, `bind`, `bindAll`, `bindKey`, `chain`, `compact`,
+     * `compose`, `concat`, `countBy`, `create`, `createCallback`, `curry`,
+     * `debounce`, `defaults`, `defer`, `delay`, `difference`, `filter`, `flatten`,
+     * `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`,
+     * `functions`, `groupBy`, `indexBy`, `initial`, `intersection`, `invert`,
+     * `invoke`, `keys`, `map`, `max`, `memoize`, `merge`, `min`, `object`, `omit`,
+     * `once`, `pairs`, `partial`, `partialRight`, `pick`, `pluck`, `pull`, `push`,
+     * `range`, `reject`, `remove`, `rest`, `reverse`, `shuffle`, `slice`, `sort`,
+     * `sortBy`, `splice`, `tap`, `throttle`, `times`, `toArray`, `transform`,
+     * `union`, `uniq`, `unshift`, `unzip`, `values`, `where`, `without`, `wrap`,
+     * and `zip`
+     *
+     * The non-chainable wrapper functions are:
+     * `clone`, `cloneDeep`, `contains`, `escape`, `every`, `find`, `findIndex`,
+     * `findKey`, `findLast`, `findLastIndex`, `findLastKey`, `has`, `identity`,
+     * `indexOf`, `isArguments`, `isArray`, `isBoolean`, `isDate`, `isElement`,
+     * `isEmpty`, `isEqual`, `isFinite`, `isFunction`, `isNaN`, `isNull`, `isNumber`,
+     * `isObject`, `isPlainObject`, `isRegExp`, `isString`, `isUndefined`, `join`,
+     * `lastIndexOf`, `mixin`, `noConflict`, `parseInt`, `pop`, `random`, `reduce`,
+     * `reduceRight`, `result`, `shift`, `size`, `some`, `sortedIndex`, `runInContext`,
+     * `template`, `unescape`, `uniqueId`, and `value`
+     *
+     * The wrapper functions `first` and `last` return wrapped values when `n` is
+     * provided, otherwise they return unwrapped values.
+     *
+     * Explicit chaining can be enabled by using the `_.chain` method.
+     *
+     * @name _
+     * @constructor
+     * @category Chaining
+     * @param {*} value The value to wrap in a `lodash` instance.
+     * @returns {Object} Returns a `lodash` instance.
+     * @example
+     *
+     * var wrapped = _([1, 2, 3]);
+     *
+     * // returns an unwrapped value
+     * wrapped.reduce(function(sum, num) {
+     *   return sum + num;
+     * });
+     * // => 6
+     *
+     * // returns a wrapped value
+     * var squares = wrapped.map(function(num) {
+     *   return num * num;
+     * });
+     *
+     * _.isArray(squares);
+     * // => false
+     *
+     * _.isArray(squares.value());
+     * // => true
+     */
+    function lodash(value) {
+      // don't wrap if already wrapped, even if wrapped by a different `lodash` constructor
+      return (value && typeof value == 'object' && !isArray(value) && hasOwnProperty.call(value, '__wrapped__'))
+       ? value
+       : new lodashWrapper(value);
+    }
+
+    /**
+     * A fast path for creating `lodash` wrapper objects.
+     *
+     * @private
+     * @param {*} value The value to wrap in a `lodash` instance.
+     * @param {boolean} chainAll A flag to enable chaining for all methods
+     * @returns {Object} Returns a `lodash` instance.
+     */
+    function lodashWrapper(value, chainAll) {
+      this.__chain__ = !!chainAll;
+      this.__wrapped__ = value;
+    }
+    // ensure `new lodashWrapper` is an instance of `lodash`
+    lodashWrapper.prototype = lodash.prototype;
+
+    /**
+     * An object used to flag environments features.
+     *
+     * @static
+     * @memberOf _
+     * @type Object
+     */
+    var support = lodash.support = {};
+
+    /**
+     * Detect if functions can be decompiled by `Function#toString`
+     * (all but PS3 and older Opera mobile browsers & avoided in Windows 8 apps).
+     *
+     * @memberOf _.support
+     * @type boolean
+     */
+    support.funcDecomp = !isNative(context.WinRTError) && reThis.test(runInContext);
+
+    /**
+     * Detect if `Function#name` is supported (all but IE).
+     *
+     * @memberOf _.support
+     * @type boolean
+     */
+    support.funcNames = typeof Function.name == 'string';
+
+    /**
+     * By default, the template delimiters used by Lo-Dash are similar to those in
+     * embedded Ruby (ERB). Change the following template settings to use alternative
+     * delimiters.
+     *
+     * @static
+     * @memberOf _
+     * @type Object
+     */
+    lodash.templateSettings = {
+
+      /**
+       * Used to detect `data` property values to be HTML-escaped.
+       *
+       * @memberOf _.templateSettings
+       * @type RegExp
+       */
+      'escape': /<%-([\s\S]+?)%>/g,
+
+      /**
+       * Used to detect code to be evaluated.
+       *
+       * @memberOf _.templateSettings
+       * @type RegExp
+       */
+      'evaluate': /<%([\s\S]+?)%>/g,
+
+      /**
+       * Used to detect `data` property values to inject.
+       *
+       * @memberOf _.templateSettings
+       * @type RegExp
+       */
+      'interpolate': reInterpolate,
+
+      /**
+       * Used to reference the data object in the template text.
+       *
+       * @memberOf _.templateSettings
+       * @type string
+       */
+      'variable': '',
+
+      /**
+       * Used to import variables into the compiled template.
+       *
+       * @memberOf _.templateSettings
+       * @type Object
+       */
+      'imports': {
+
+        /**
+         * A reference to the `lodash` function.
+         *
+         * @memberOf _.templateSettings.imports
+         * @type Function
+         */
+        '_': lodash
+      }
+    };
+
+    /*--------------------------------------------------------------------------*/
+
+    /**
+     * The base implementation of `_.bind` that creates the bound function and
+     * sets its meta data.
+     *
+     * @private
+     * @param {Array} bindData The bind data array.
+     * @returns {Function} Returns the new bound function.
+     */
+    function baseBind(bindData) {
+      var func = bindData[0],
+          partialArgs = bindData[2],
+          thisArg = bindData[4];
+
+      function bound() {
+        // `Function#bind` spec
+        // http://es5.github.io/#x15.3.4.5
+        if (partialArgs) {
+          // avoid `arguments` object deoptimizations by using `slice` instead
+          // of `Array.prototype.slice.call` and not assigning `arguments` to a
+          // variable as a ternary expression
+          var args = slice(partialArgs);
+          push.apply(args, arguments);
+        }
+        // mimic the constructor's `return` behavior
+        // http://es5.github.io/#x13.2.2
+        if (this instanceof bound) {
+          // ensure `new bound` is an instance of `func`
+          var thisBinding = baseCreate(func.prototype),
+              result = func.apply(thisBinding, args || arguments);
+          return isObject(result) ? result : thisBinding;
+        }
+        return func.apply(thisArg, args || arguments);
+      }
+      setBindData(bound, bindData);
+      return bound;
+    }
+
+    /**
+     * The base implementation of `_.clone` without argument juggling or support
+     * for `thisArg` binding.
+     *
+     * @private
+     * @param {*} value The value to clone.
+     * @param {boolean} [isDeep=false] Specify a deep clone.
+     * @param {Function} [callback] The function to customize cloning values.
+     * @param {Array} [stackA=[]] Tracks traversed source objects.
+     * @param {Array} [stackB=[]] Associates clones with source counterparts.
+     * @returns {*} Returns the cloned value.
+     */
+    function baseClone(value, isDeep, callback, stackA, stackB) {
+      if (callback) {
+        var result = callback(value);
+        if (typeof result != 'undefined') {
+          return result;
+        }
+      }
+      // inspect [[Class]]
+      var isObj = isObject(value);
+      if (isObj) {
+        var className = toString.call(value);
+        if (!cloneableClasses[className]) {
+          return value;
+        }
+        var ctor = ctorByClass[className];
+        switch (className) {
+          case boolClass:
+          case dateClass:
+            return new ctor(+value);
+
+          case numberClass:
+          case stringClass:
+            return new ctor(value);
+
+          case regexpClass:
+            result = ctor(value.source, reFlags.exec(value));
+            result.lastIndex = value.lastIndex;
+            return result;
+        }
+      } else {
+        return value;
+      }
+      var isArr = isArray(value);
+      if (isDeep) {
+        // check for circular references and return corresponding clone
+        var initedStack = !stackA;
+        stackA || (stackA = getArray());
+        stackB || (stackB = getArray());
+
+        var length = stackA.length;
+        while (length--) {
+          if (stackA[length] == value) {
+            return stackB[length];
+          }
+        }
+        result = isArr ? ctor(value.length) : {};
+      }
+      else {
+        result = isArr ? slice(value) : assign({}, value);
+      }
+      // add array properties assigned by `RegExp#exec`
+      if (isArr) {
+        if (hasOwnProperty.call(value, 'index')) {
+          result.index = value.index;
+        }
+        if (hasOwnProperty.call(value, 'input')) {
+          result.input = value.input;
+        }
+      }
+      // exit for shallow clone
+      if (!isDeep) {
+        return result;
+      }
+      // add the source value to the stack of traversed objects
+      // and associate it with its clone
+      stackA.push(value);
+      stackB.push(result);
+
+      // recursively populate clone (susceptible to call stack limits)
+      (isArr ? forEach : forOwn)(value, function(objValue, key) {
+        result[key] = baseClone(objValue, isDeep, callback, stackA, stackB);
+      });
+
+      if (initedStack) {
+        releaseArray(stackA);
+        releaseArray(stackB);
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.create` without support for assigning
+     * properties to the created object.
+     *
+     * @private
+     * @param {Object} prototype The object to inherit from.
+     * @returns {Object} Returns the new object.
+     */
+    function baseCreate(prototype, properties) {
+      return isObject(prototype) ? nativeCreate(prototype) : {};
+    }
+    // fallback for browsers without `Object.create`
+    if (!nativeCreate) {
+      baseCreate = (function() {
+        function Object() {}
+        return function(prototype) {
+          if (isObject(prototype)) {
+            Object.prototype = prototype;
+            var result = new Object;
+            Object.prototype = null;
+          }
+          return result || context.Object();
+        };
+      }());
+    }
+
+    /**
+     * The base implementation of `_.createCallback` without support for creating
+     * "_.pluck" or "_.where" style callbacks.
+     *
+     * @private
+     * @param {*} [func=identity] The value to convert to a callback.
+     * @param {*} [thisArg] The `this` binding of the created callback.
+     * @param {number} [argCount] The number of arguments the callback accepts.
+     * @returns {Function} Returns a callback function.
+     */
+    function baseCreateCallback(func, thisArg, argCount) {
+      if (typeof func != 'function') {
+        return identity;
+      }
+      // exit early for no `thisArg` or already bound by `Function#bind`
+      if (typeof thisArg == 'undefined' || !('prototype' in func)) {
+        return func;
+      }
+      var bindData = func.__bindData__;
+      if (typeof bindData == 'undefined') {
+        if (support.funcNames) {
+          bindData = !func.name;
+        }
+        bindData = bindData || !support.funcDecomp;
+        if (!bindData) {
+          var source = fnToString.call(func);
+          if (!support.funcNames) {
+            bindData = !reFuncName.test(source);
+          }
+          if (!bindData) {
+            // checks if `func` references the `this` keyword and stores the result
+            bindData = reThis.test(source);
+            setBindData(func, bindData);
+          }
+        }
+      }
+      // exit early if there are no `this` references or `func` is bound
+      if (bindData === false || (bindData !== true && bindData[1] & 1)) {
+        return func;
+      }
+      switch (argCount) {
+        case 1: return function(value) {
+          return func.call(thisArg, value);
+        };
+        case 2: return function(a, b) {
+          return func.call(thisArg, a, b);
+        };
+        case 3: return function(value, index, collection) {
+          return func.call(thisArg, value, index, collection);
+        };
+        case 4: return function(accumulator, value, index, collection) {
+          return func.call(thisArg, accumulator, value, index, collection);
+        };
+      }
+      return bind(func, thisArg);
+    }
+
+    /**
+     * The base implementation of `createWrapper` that creates the wrapper and
+     * sets its meta data.
+     *
+     * @private
+     * @param {Array} bindData The bind data array.
+     * @returns {Function} Returns the new function.
+     */
+    function baseCreateWrapper(bindData) {
+      var func = bindData[0],
+          bitmask = bindData[1],
+          partialArgs = bindData[2],
+          partialRightArgs = bindData[3],
+          thisArg = bindData[4],
+          arity = bindData[5];
+
+      var isBind = bitmask & 1,
+          isBindKey = bitmask & 2,
+          isCurry = bitmask & 4,
+          isCurryBound = bitmask & 8,
+          key = func;
+
+      function bound() {
+        var thisBinding = isBind ? thisArg : this;
+        if (partialArgs) {
+          var args = slice(partialArgs);
+          push.apply(args, arguments);
+        }
+        if (partialRightArgs || isCurry) {
+          args || (args = slice(arguments));
+          if (partialRightArgs) {
+            push.apply(args, partialRightArgs);
+          }
+          if (isCurry && args.length < arity) {
+            bitmask |= 16 & ~32;
+            return baseCreateWrapper([func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity]);
+          }
+        }
+        args || (args = arguments);
+        if (isBindKey) {
+          func = thisBinding[key];
+        }
+        if (this instanceof bound) {
+          thisBinding = baseCreate(func.prototype);
+          var result = func.apply(thisBinding, args);
+          return isObject(result) ? result : thisBinding;
+        }
+        return func.apply(thisBinding, args);
+      }
+      setBindData(bound, bindData);
+      return bound;
+    }
+
+    /**
+     * The base implementation of `_.difference` that accepts a single array
+     * of values to exclude.
+     *
+     * @private
+     * @param {Array} array The array to process.
+     * @param {Array} [values] The array of values to exclude.
+     * @returns {Array} Returns a new array of filtered values.
+     */
+    function baseDifference(array, values) {
+      var index = -1,
+          indexOf = getIndexOf(),
+          length = array ? array.length : 0,
+          isLarge = length >= largeArraySize && indexOf === baseIndexOf,
+          result = [];
+
+      if (isLarge) {
+        var cache = createCache(values);
+        if (cache) {
+          indexOf = cacheIndexOf;
+          values = cache;
+        } else {
+          isLarge = false;
+        }
+      }
+      while (++index < length) {
+        var value = array[index];
+        if (indexOf(values, value) < 0) {
+          result.push(value);
+        }
+      }
+      if (isLarge) {
+        releaseObject(values);
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.flatten` without support for callback
+     * shorthands or `thisArg` binding.
+     *
+     * @private
+     * @param {Array} array The array to flatten.
+     * @param {boolean} [isShallow=false] A flag to restrict flattening to a single level.
+     * @param {boolean} [isStrict=false] A flag to restrict flattening to arrays and `arguments` objects.
+     * @param {number} [fromIndex=0] The index to start from.
+     * @returns {Array} Returns a new flattened array.
+     */
+    function baseFlatten(array, isShallow, isStrict, fromIndex) {
+      var index = (fromIndex || 0) - 1,
+          length = array ? array.length : 0,
+          result = [];
+
+      while (++index < length) {
+        var value = array[index];
+
+        if (value && typeof value == 'object' && typeof value.length == 'number'
+            && (isArray(value) || isArguments(value))) {
+          // recursively flatten arrays (susceptible to call stack limits)
+          if (!isShallow) {
+            value = baseFlatten(value, isShallow, isStrict);
+          }
+          var valIndex = -1,
+              valLength = value.length,
+              resIndex = result.length;
+
+          result.length += valLength;
+          while (++valIndex < valLength) {
+            result[resIndex++] = value[valIndex];
+          }
+        } else if (!isStrict) {
+          result.push(value);
+        }
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.isEqual`, without support for `thisArg` binding,
+     * that allows partial "_.where" style comparisons.
+     *
+     * @private
+     * @param {*} a The value to compare.
+     * @param {*} b The other value to compare.
+     * @param {Function} [callback] The function to customize comparing values.
+     * @param {Function} [isWhere=false] A flag to indicate performing partial comparisons.
+     * @param {Array} [stackA=[]] Tracks traversed `a` objects.
+     * @param {Array} [stackB=[]] Tracks traversed `b` objects.
+     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+     */
+    function baseIsEqual(a, b, callback, isWhere, stackA, stackB) {
+      // used to indicate that when comparing objects, `a` has at least the properties of `b`
+      if (callback) {
+        var result = callback(a, b);
+        if (typeof result != 'undefined') {
+          return !!result;
+        }
+      }
+      // exit early for identical values
+      if (a === b) {
+        // treat `+0` vs. `-0` as not equal
+        return a !== 0 || (1 / a == 1 / b);
+      }
+      var type = typeof a,
+          otherType = typeof b;
+
+      // exit early for unlike primitive values
+      if (a === a &&
+          !(a && objectTypes[type]) &&
+          !(b && objectTypes[otherType])) {
+        return false;
+      }
+      // exit early for `null` and `undefined` avoiding ES3's Function#call behavior
+      // http://es5.github.io/#x15.3.4.4
+      if (a == null || b == null) {
+        return a === b;
+      }
+      // compare [[Class]] names
+      var className = toString.call(a),
+          otherClass = toString.call(b);
+
+      if (className == argsClass) {
+        className = objectClass;
+      }
+      if (otherClass == argsClass) {
+        otherClass = objectClass;
+      }
+      if (className != otherClass) {
+        return false;
+      }
+      switch (className) {
+        case boolClass:
+        case dateClass:
+          // coerce dates and booleans to numbers, dates to milliseconds and booleans
+          // to `1` or `0` treating invalid dates coerced to `NaN` as not equal
+          return +a == +b;
+
+        case numberClass:
+          // treat `NaN` vs. `NaN` as equal
+          return (a != +a)
+            ? b != +b
+            // but treat `+0` vs. `-0` as not equal
+            : (a == 0 ? (1 / a == 1 / b) : a == +b);
+
+        case regexpClass:
+        case stringClass:
+          // coerce regexes to strings (http://es5.github.io/#x15.10.6.4)
+          // treat string primitives and their corresponding object instances as equal
+          return a == String(b);
+      }
+      var isArr = className == arrayClass;
+      if (!isArr) {
+        // unwrap any `lodash` wrapped values
+        var aWrapped = hasOwnProperty.call(a, '__wrapped__'),
+            bWrapped = hasOwnProperty.call(b, '__wrapped__');
+
+        if (aWrapped || bWrapped) {
+          return baseIsEqual(aWrapped ? a.__wrapped__ : a, bWrapped ? b.__wrapped__ : b, callback, isWhere, stackA, stackB);
+        }
+        // exit for functions and DOM nodes
+        if (className != objectClass) {
+          return false;
+        }
+        // in older versions of Opera, `arguments` objects have `Array` constructors
+        var ctorA = a.constructor,
+            ctorB = b.constructor;
+
+        // non `Object` object instances with different constructors are not equal
+        if (ctorA != ctorB &&
+              !(isFunction(ctorA) && ctorA instanceof ctorA && isFunction(ctorB) && ctorB instanceof ctorB) &&
+              ('constructor' in a && 'constructor' in b)
+            ) {
+          return false;
+        }
+      }
+      // assume cyclic structures are equal
+      // the algorithm for detecting cyclic structures is adapted from ES 5.1
+      // section 15.12.3, abstract operation `JO` (http://es5.github.io/#x15.12.3)
+      var initedStack = !stackA;
+      stackA || (stackA = getArray());
+      stackB || (stackB = getArray());
+
+      var length = stackA.length;
+      while (length--) {
+        if (stackA[length] == a) {
+          return stackB[length] == b;
+        }
+      }
+      var size = 0;
+      result = true;
+
+      // add `a` and `b` to the stack of traversed objects
+      stackA.push(a);
+      stackB.push(b);
+
+      // recursively compare objects and arrays (susceptible to call stack limits)
+      if (isArr) {
+        // compare lengths to determine if a deep comparison is necessary
+        length = a.length;
+        size = b.length;
+        result = size == length;
+
+        if (result || isWhere) {
+          // deep compare the contents, ignoring non-numeric properties
+          while (size--) {
+            var index = length,
+                value = b[size];
+
+            if (isWhere) {
+              while (index--) {
+                if ((result = baseIsEqual(a[index], value, callback, isWhere, stackA, stackB))) {
+                  break;
+                }
+              }
+            } else if (!(result = baseIsEqual(a[size], value, callback, isWhere, stackA, stackB))) {
+              break;
+            }
+          }
+        }
+      }
+      else {
+        // deep compare objects using `forIn`, instead of `forOwn`, to avoid `Object.keys`
+        // which, in this case, is more costly
+        forIn(b, function(value, key, b) {
+          if (hasOwnProperty.call(b, key)) {
+            // count the number of properties.
+            size++;
+            // deep compare each property value.
+            return (result = hasOwnProperty.call(a, key) && baseIsEqual(a[key], value, callback, isWhere, stackA, stackB));
+          }
+        });
+
+        if (result && !isWhere) {
+          // ensure both objects have the same number of properties
+          forIn(a, function(value, key, a) {
+            if (hasOwnProperty.call(a, key)) {
+              // `size` will be `-1` if `a` has more properties than `b`
+              return (result = --size > -1);
+            }
+          });
+        }
+      }
+      stackA.pop();
+      stackB.pop();
+
+      if (initedStack) {
+        releaseArray(stackA);
+        releaseArray(stackB);
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.merge` without argument juggling or support
+     * for `thisArg` binding.
+     *
+     * @private
+     * @param {Object} object The destination object.
+     * @param {Object} source The source object.
+     * @param {Function} [callback] The function to customize merging properties.
+     * @param {Array} [stackA=[]] Tracks traversed source objects.
+     * @param {Array} [stackB=[]] Associates values with source counterparts.
+     */
+    function baseMerge(object, source, callback, stackA, stackB) {
+      (isArray(source) ? forEach : forOwn)(source, function(source, key) {
+        var found,
+            isArr,
+            result = source,
+            value = object[key];
+
+        if (source && ((isArr = isArray(source)) || isPlainObject(source))) {
+          // avoid merging previously merged cyclic sources
+          var stackLength = stackA.length;
+          while (stackLength--) {
+            if ((found = stackA[stackLength] == source)) {
+              value = stackB[stackLength];
+              break;
+            }
+          }
+          if (!found) {
+            var isShallow;
+            if (callback) {
+              result = callback(value, source);
+              if ((isShallow = typeof result != 'undefined')) {
+                value = result;
+              }
+            }
+            if (!isShallow) {
+              value = isArr
+                ? (isArray(value) ? value : [])
+                : (isPlainObject(value) ? value : {});
+            }
+            // add `source` and associated `value` to the stack of traversed objects
+            stackA.push(source);
+            stackB.push(value);
+
+            // recursively merge objects and arrays (susceptible to call stack limits)
+            if (!isShallow) {
+              baseMerge(value, source, callback, stackA, stackB);
+            }
+          }
+        }
+        else {
+          if (callback) {
+            result = callback(value, source);
+            if (typeof result == 'undefined') {
+              result = source;
+            }
+          }
+          if (typeof result != 'undefined') {
+            value = result;
+          }
+        }
+        object[key] = value;
+      });
+    }
+
+    /**
+     * The base implementation of `_.random` without argument juggling or support
+     * for returning floating-point numbers.
+     *
+     * @private
+     * @param {number} min The minimum possible value.
+     * @param {number} max The maximum possible value.
+     * @returns {number} Returns a random number.
+     */
+    function baseRandom(min, max) {
+      return min + floor(nativeRandom() * (max - min + 1));
+    }
+
+    /**
+     * The base implementation of `_.uniq` without support for callback shorthands
+     * or `thisArg` binding.
+     *
+     * @private
+     * @param {Array} array The array to process.
+     * @param {boolean} [isSorted=false] A flag to indicate that `array` is sorted.
+     * @param {Function} [callback] The function called per iteration.
+     * @returns {Array} Returns a duplicate-value-free array.
+     */
+    function baseUniq(array, isSorted, callback) {
+      var index = -1,
+          indexOf = getIndexOf(),
+          length = array ? array.length : 0,
+          result = [];
+
+      var isLarge = !isSorted && length >= largeArraySize && indexOf === baseIndexOf,
+          seen = (callback || isLarge) ? getArray() : result;
+
+      if (isLarge) {
+        var cache = createCache(seen);
+        indexOf = cacheIndexOf;
+        seen = cache;
+      }
+      while (++index < length) {
+        var value = array[index],
+            computed = callback ? callback(value, index, array) : value;
+
+        if (isSorted
+              ? !index || seen[seen.length - 1] !== computed
+              : indexOf(seen, computed) < 0
+            ) {
+          if (callback || isLarge) {
+            seen.push(computed);
+          }
+          result.push(value);
+        }
+      }
+      if (isLarge) {
+        releaseArray(seen.array);
+        releaseObject(seen);
+      } else if (callback) {
+        releaseArray(seen);
+      }
+      return result;
+    }
+
+    /**
+     * Creates a function that aggregates a collection, creating an object composed
+     * of keys generated from the results of running each element of the collection
+     * through a callback. The given `setter` function sets the keys and values
+     * of the composed object.
+     *
+     * @private
+     * @param {Function} setter The setter function.
+     * @returns {Function} Returns the new aggregator function.
+     */
+    function createAggregator(setter) {
+      return function(collection, callback, thisArg) {
+        var result = {};
+        callback = lodash.createCallback(callback, thisArg, 3);
+
+        var index = -1,
+            length = collection ? collection.length : 0;
+
+        if (typeof length == 'number') {
+          while (++index < length) {
+            var value = collection[index];
+            setter(result, value, callback(value, index, collection), collection);
+          }
+        } else {
+          forOwn(collection, function(value, key, collection) {
+            setter(result, value, callback(value, key, collection), collection);
+          });
+        }
+        return result;
+      };
+    }
+
+    /**
+     * Creates a function that, when called, either curries or invokes `func`
+     * with an optional `this` binding and partially applied arguments.
+     *
+     * @private
+     * @param {Function|string} func The function or method name to reference.
+     * @param {number} bitmask The bitmask of method flags to compose.
+     *  The bitmask may be composed of the following flags:
+     *  1 - `_.bind`
+     *  2 - `_.bindKey`
+     *  4 - `_.curry`
+     *  8 - `_.curry` (bound)
+     *  16 - `_.partial`
+     *  32 - `_.partialRight`
+     * @param {Array} [partialArgs] An array of arguments to prepend to those
+     *  provided to the new function.
+     * @param {Array} [partialRightArgs] An array of arguments to append to those
+     *  provided to the new function.
+     * @param {*} [thisArg] The `this` binding of `func`.
+     * @param {number} [arity] The arity of `func`.
+     * @returns {Function} Returns the new function.
+     */
+    function createWrapper(func, bitmask, partialArgs, partialRightArgs, thisArg, arity) {
+      var isBind = bitmask & 1,
+          isBindKey = bitmask & 2,
+          isCurry = bitmask & 4,
+          isCurryBound = bitmask & 8,
+          isPartial = bitmask & 16,
+          isPartialRight = bitmask & 32;
+
+      if (!isBindKey && !isFunction(func)) {
+        throw new TypeError;
+      }
+      if (isPartial && !partialArgs.length) {
+        bitmask &= ~16;
+        isPartial = partialArgs = false;
+      }
+      if (isPartialRight && !partialRightArgs.length) {
+        bitmask &= ~32;
+        isPartialRight = partialRightArgs = false;
+      }
+      var bindData = func && func.__bindData__;
+      if (bindData && bindData !== true) {
+        // clone `bindData`
+        bindData = slice(bindData);
+        if (bindData[2]) {
+          bindData[2] = slice(bindData[2]);
+        }
+        if (bindData[3]) {
+          bindData[3] = slice(bindData[3]);
+        }
+        // set `thisBinding` is not previously bound
+        if (isBind && !(bindData[1] & 1)) {
+          bindData[4] = thisArg;
+        }
+        // set if previously bound but not currently (subsequent curried functions)
+        if (!isBind && bindData[1] & 1) {
+          bitmask |= 8;
+        }
+        // set curried arity if not yet set
+        if (isCurry && !(bindData[1] & 4)) {
+          bindData[5] = arity;
+        }
+        // append partial left arguments
+        if (isPartial) {
+          push.apply(bindData[2] || (bindData[2] = []), partialArgs);
+        }
+        // append partial right arguments
+        if (isPartialRight) {
+          unshift.apply(bindData[3] || (bindData[3] = []), partialRightArgs);
+        }
+        // merge flags
+        bindData[1] |= bitmask;
+        return createWrapper.apply(null, bindData);
+      }
+      // fast path for `_.bind`
+      var creater = (bitmask == 1 || bitmask === 17) ? baseBind : baseCreateWrapper;
+      return creater([func, bitmask, partialArgs, partialRightArgs, thisArg, arity]);
+    }
+
+    /**
+     * Used by `escape` to convert characters to HTML entities.
+     *
+     * @private
+     * @param {string} match The matched character to escape.
+     * @returns {string} Returns the escaped character.
+     */
+    function escapeHtmlChar(match) {
+      return htmlEscapes[match];
+    }
+
+    /**
+     * Gets the appropriate "indexOf" function. If the `_.indexOf` method is
+     * customized, this method returns the custom method, otherwise it returns
+     * the `baseIndexOf` function.
+     *
+     * @private
+     * @returns {Function} Returns the "indexOf" function.
+     */
+    function getIndexOf() {
+      var result = (result = lodash.indexOf) === indexOf ? baseIndexOf : result;
+      return result;
+    }
+
+    /**
+     * Checks if `value` is a native function.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is a native function, else `false`.
+     */
+    function isNative(value) {
+      return typeof value == 'function' && reNative.test(value);
+    }
+
+    /**
+     * Sets `this` binding data on a given function.
+     *
+     * @private
+     * @param {Function} func The function to set data on.
+     * @param {Array} value The data array to set.
+     */
+    var setBindData = !defineProperty ? noop : function(func, value) {
+      descriptor.value = value;
+      defineProperty(func, '__bindData__', descriptor);
+    };
+
+    /**
+     * A fallback implementation of `isPlainObject` which checks if a given value
+     * is an object created by the `Object` constructor, assuming objects created
+     * by the `Object` constructor have no inherited enumerable properties and that
+     * there are no `Object.prototype` extensions.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
+     */
+    function shimIsPlainObject(value) {
+      var ctor,
+          result;
+
+      // avoid non Object objects, `arguments` objects, and DOM elements
+      if (!(value && toString.call(value) == objectClass) ||
+          (ctor = value.constructor, isFunction(ctor) && !(ctor instanceof ctor))) {
+        return false;
+      }
+      // In most environments an object's own properties are iterated before
+      // its inherited properties. If the last iterated property is an object's
+      // own property then there are no inherited enumerable properties.
+      forIn(value, function(value, key) {
+        result = key;
+      });
+      return typeof result == 'undefined' || hasOwnProperty.call(value, result);
+    }
+
+    /**
+     * Used by `unescape` to convert HTML entities to characters.
+     *
+     * @private
+     * @param {string} match The matched character to unescape.
+     * @returns {string} Returns the unescaped character.
+     */
+    function unescapeHtmlChar(match) {
+      return htmlUnescapes[match];
+    }
+
+    /*--------------------------------------------------------------------------*/
+
+    /**
+     * Checks if `value` is an `arguments` object.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is an `arguments` object, else `false`.
+     * @example
+     *
+     * (function() { return _.isArguments(arguments); })(1, 2, 3);
+     * // => true
+     *
+     * _.isArguments([1, 2, 3]);
+     * // => false
+     */
+    function isArguments(value) {
+      return value && typeof value == 'object' && typeof value.length == 'number' &&
+        toString.call(value) == argsClass || false;
+    }
+
+    /**
+     * Checks if `value` is an array.
+     *
+     * @static
+     * @memberOf _
+     * @type Function
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is an array, else `false`.
+     * @example
+     *
+     * (function() { return _.isArray(arguments); })();
+     * // => false
+     *
+     * _.isArray([1, 2, 3]);
+     * // => true
+     */
+    var isArray = nativeIsArray || function(value) {
+      return value && typeof value == 'object' && typeof value.length == 'number' &&
+        toString.call(value) == arrayClass || false;
+    };
+
+    /**
+     * A fallback implementation of `Object.keys` which produces an array of the
+     * given object's own enumerable property names.
+     *
+     * @private
+     * @type Function
+     * @param {Object} object The object to inspect.
+     * @returns {Array} Returns an array of property names.
+     */
+    var shimKeys = function(object) {
+      var index, iterable = object, result = [];
+      if (!iterable) return result;
+      if (!(objectTypes[typeof object])) return result;
+        for (index in iterable) {
+          if (hasOwnProperty.call(iterable, index)) {
+            result.push(index);
+          }
+        }
+      return result
+    };
+
+    /**
+     * Creates an array composed of the own enumerable property names of an object.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The object to inspect.
+     * @returns {Array} Returns an array of property names.
+     * @example
+     *
+     * _.keys({ 'one': 1, 'two': 2, 'three': 3 });
+     * // => ['one', 'two', 'three'] (property order is not guaranteed across environments)
+     */
+    var keys = !nativeKeys ? shimKeys : function(object) {
+      if (!isObject(object)) {
+        return [];
+      }
+      return nativeKeys(object);
+    };
+
+    /**
+     * Used to convert characters to HTML entities:
+     *
+     * Though the `>` character is escaped for symmetry, characters like `>` and `/`
+     * don't require escaping in HTML and have no special meaning unless they're part
+     * of a tag or an unquoted attribute value.
+     * http://mathiasbynens.be/notes/ambiguous-ampersands (under "semi-related fun fact")
+     */
+    var htmlEscapes = {
+      '&': '&amp;',
+      '<': '&lt;',
+      '>': '&gt;',
+      '"': '&quot;',
+      "'": '&#39;'
+    };
+
+    /** Used to convert HTML entities to characters */
+    var htmlUnescapes = invert(htmlEscapes);
+
+    /** Used to match HTML entities and HTML characters */
+    var reEscapedHtml = RegExp('(' + keys(htmlUnescapes).join('|') + ')', 'g'),
+        reUnescapedHtml = RegExp('[' + keys(htmlEscapes).join('') + ']', 'g');
+
+    /*--------------------------------------------------------------------------*/
+
+    /**
+     * Assigns own enumerable properties of source object(s) to the destination
+     * object. Subsequent sources will overwrite property assignments of previous
+     * sources. If a callback is provided it will be executed to produce the
+     * assigned values. The callback is bound to `thisArg` and invoked with two
+     * arguments; (objectValue, sourceValue).
+     *
+     * @static
+     * @memberOf _
+     * @type Function
+     * @alias extend
+     * @category Objects
+     * @param {Object} object The destination object.
+     * @param {...Object} [source] The source objects.
+     * @param {Function} [callback] The function to customize assigning values.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Object} Returns the destination object.
+     * @example
+     *
+     * _.assign({ 'name': 'fred' }, { 'employer': 'slate' });
+     * // => { 'name': 'fred', 'employer': 'slate' }
+     *
+     * var defaults = _.partialRight(_.assign, function(a, b) {
+     *   return typeof a == 'undefined' ? b : a;
+     * });
+     *
+     * var object = { 'name': 'barney' };
+     * defaults(object, { 'name': 'fred', 'employer': 'slate' });
+     * // => { 'name': 'barney', 'employer': 'slate' }
+     */
+    var assign = function(object, source, guard) {
+      var index, iterable = object, result = iterable;
+      if (!iterable) return result;
+      var args = arguments,
+          argsIndex = 0,
+          argsLength = typeof guard == 'number' ? 2 : args.length;
+      if (argsLength > 3 && typeof args[argsLength - 2] == 'function') {
+        var callback = baseCreateCallback(args[--argsLength - 1], args[argsLength--], 2);
+      } else if (argsLength > 2 && typeof args[argsLength - 1] == 'function') {
+        callback = args[--argsLength];
+      }
+      while (++argsIndex < argsLength) {
+        iterable = args[argsIndex];
+        if (iterable && objectTypes[typeof iterable]) {
+        var ownIndex = -1,
+            ownProps = objectTypes[typeof iterable] && keys(iterable),
+            length = ownProps ? ownProps.length : 0;
+
+        while (++ownIndex < length) {
+          index = ownProps[ownIndex];
+          result[index] = callback ? callback(result[index], iterable[index]) : iterable[index];
+        }
+        }
+      }
+      return result
+    };
+
+    /**
+     * Creates a clone of `value`. If `isDeep` is `true` nested objects will also
+     * be cloned, otherwise they will be assigned by reference. If a callback
+     * is provided it will be executed to produce the cloned values. If the
+     * callback returns `undefined` cloning will be handled by the method instead.
+     * The callback is bound to `thisArg` and invoked with one argument; (value).
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to clone.
+     * @param {boolean} [isDeep=false] Specify a deep clone.
+     * @param {Function} [callback] The function to customize cloning values.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {*} Returns the cloned value.
+     * @example
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36 },
+     *   { 'name': 'fred',   'age': 40 }
+     * ];
+     *
+     * var shallow = _.clone(characters);
+     * shallow[0] === characters[0];
+     * // => true
+     *
+     * var deep = _.clone(characters, true);
+     * deep[0] === characters[0];
+     * // => false
+     *
+     * _.mixin({
+     *   'clone': _.partialRight(_.clone, function(value) {
+     *     return _.isElement(value) ? value.cloneNode(false) : undefined;
+     *   })
+     * });
+     *
+     * var clone = _.clone(document.body);
+     * clone.childNodes.length;
+     * // => 0
+     */
+    function clone(value, isDeep, callback, thisArg) {
+      // allows working with "Collections" methods without using their `index`
+      // and `collection` arguments for `isDeep` and `callback`
+      if (typeof isDeep != 'boolean' && isDeep != null) {
+        thisArg = callback;
+        callback = isDeep;
+        isDeep = false;
+      }
+      return baseClone(value, isDeep, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));
+    }
+
+    /**
+     * Creates a deep clone of `value`. If a callback is provided it will be
+     * executed to produce the cloned values. If the callback returns `undefined`
+     * cloning will be handled by the method instead. The callback is bound to
+     * `thisArg` and invoked with one argument; (value).
+     *
+     * Note: This method is loosely based on the structured clone algorithm. Functions
+     * and DOM nodes are **not** cloned. The enumerable properties of `arguments` objects and
+     * objects created by constructors other than `Object` are cloned to plain `Object` objects.
+     * See http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to deep clone.
+     * @param {Function} [callback] The function to customize cloning values.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {*} Returns the deep cloned value.
+     * @example
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36 },
+     *   { 'name': 'fred',   'age': 40 }
+     * ];
+     *
+     * var deep = _.cloneDeep(characters);
+     * deep[0] === characters[0];
+     * // => false
+     *
+     * var view = {
+     *   'label': 'docs',
+     *   'node': element
+     * };
+     *
+     * var clone = _.cloneDeep(view, function(value) {
+     *   return _.isElement(value) ? value.cloneNode(true) : undefined;
+     * });
+     *
+     * clone.node == view.node;
+     * // => false
+     */
+    function cloneDeep(value, callback, thisArg) {
+      return baseClone(value, true, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));
+    }
+
+    /**
+     * Creates an object that inherits from the given `prototype` object. If a
+     * `properties` object is provided its own enumerable properties are assigned
+     * to the created object.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} prototype The object to inherit from.
+     * @param {Object} [properties] The properties to assign to the object.
+     * @returns {Object} Returns the new object.
+     * @example
+     *
+     * function Shape() {
+     *   this.x = 0;
+     *   this.y = 0;
+     * }
+     *
+     * function Circle() {
+     *   Shape.call(this);
+     * }
+     *
+     * Circle.prototype = _.create(Shape.prototype, { 'constructor': Circle });
+     *
+     * var circle = new Circle;
+     * circle instanceof Circle;
+     * // => true
+     *
+     * circle instanceof Shape;
+     * // => true
+     */
+    function create(prototype, properties) {
+      var result = baseCreate(prototype);
+      return properties ? assign(result, properties) : result;
+    }
+
+    /**
+     * Assigns own enumerable properties of source object(s) to the destination
+     * object for all destination properties that resolve to `undefined`. Once a
+     * property is set, additional defaults of the same property will be ignored.
+     *
+     * @static
+     * @memberOf _
+     * @type Function
+     * @category Objects
+     * @param {Object} object The destination object.
+     * @param {...Object} [source] The source objects.
+     * @param- {Object} [guard] Allows working with `_.reduce` without using its
+     *  `key` and `object` arguments as sources.
+     * @returns {Object} Returns the destination object.
+     * @example
+     *
+     * var object = { 'name': 'barney' };
+     * _.defaults(object, { 'name': 'fred', 'employer': 'slate' });
+     * // => { 'name': 'barney', 'employer': 'slate' }
+     */
+    var defaults = function(object, source, guard) {
+      var index, iterable = object, result = iterable;
+      if (!iterable) return result;
+      var args = arguments,
+          argsIndex = 0,
+          argsLength = typeof guard == 'number' ? 2 : args.length;
+      while (++argsIndex < argsLength) {
+        iterable = args[argsIndex];
+        if (iterable && objectTypes[typeof iterable]) {
+        var ownIndex = -1,
+            ownProps = objectTypes[typeof iterable] && keys(iterable),
+            length = ownProps ? ownProps.length : 0;
+
+        while (++ownIndex < length) {
+          index = ownProps[ownIndex];
+          if (typeof result[index] == 'undefined') result[index] = iterable[index];
+        }
+        }
+      }
+      return result
+    };
+
+    /**
+     * This method is like `_.findIndex` except that it returns the key of the
+     * first element that passes the callback check, instead of the element itself.
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The object to search.
+     * @param {Function|Object|string} [callback=identity] The function called per
+     *  iteration. If a property name or object is provided it will be used to
+     *  create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {string|undefined} Returns the key of the found element, else `undefined`.
+     * @example
+     *
+     * var characters = {
+     *   'barney': {  'age': 36, 'blocked': false },
+     *   'fred': {    'age': 40, 'blocked': true },
+     *   'pebbles': { 'age': 1,  'blocked': false }
+     * };
+     *
+     * _.findKey(characters, function(chr) {
+     *   return chr.age < 40;
+     * });
+     * // => 'barney' (property order is not guaranteed across environments)
+     *
+     * // using "_.where" callback shorthand
+     * _.findKey(characters, { 'age': 1 });
+     * // => 'pebbles'
+     *
+     * // using "_.pluck" callback shorthand
+     * _.findKey(characters, 'blocked');
+     * // => 'fred'
+     */
+    function findKey(object, callback, thisArg) {
+      var result;
+      callback = lodash.createCallback(callback, thisArg, 3);
+      forOwn(object, function(value, key, object) {
+        if (callback(value, key, object)) {
+          result = key;
+          return false;
+        }
+      });
+      return result;
+    }
+
+    /**
+     * This method is like `_.findKey` except that it iterates over elements
+     * of a `collection` in the opposite order.
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The object to search.
+     * @param {Function|Object|string} [callback=identity] The function called per
+     *  iteration. If a property name or object is provided it will be used to
+     *  create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {string|undefined} Returns the key of the found element, else `undefined`.
+     * @example
+     *
+     * var characters = {
+     *   'barney': {  'age': 36, 'blocked': true },
+     *   'fred': {    'age': 40, 'blocked': false },
+     *   'pebbles': { 'age': 1,  'blocked': true }
+     * };
+     *
+     * _.findLastKey(characters, function(chr) {
+     *   return chr.age < 40;
+     * });
+     * // => returns `pebbles`, assuming `_.findKey` returns `barney`
+     *
+     * // using "_.where" callback shorthand
+     * _.findLastKey(characters, { 'age': 40 });
+     * // => 'fred'
+     *
+     * // using "_.pluck" callback shorthand
+     * _.findLastKey(characters, 'blocked');
+     * // => 'pebbles'
+     */
+    function findLastKey(object, callback, thisArg) {
+      var result;
+      callback = lodash.createCallback(callback, thisArg, 3);
+      forOwnRight(object, function(value, key, object) {
+        if (callback(value, key, object)) {
+          result = key;
+          return false;
+        }
+      });
+      return result;
+    }
+
+    /**
+     * Iterates over own and inherited enumerable properties of an object,
+     * executing the callback for each property. The callback is bound to `thisArg`
+     * and invoked with three arguments; (value, key, object). Callbacks may exit
+     * iteration early by explicitly returning `false`.
+     *
+     * @static
+     * @memberOf _
+     * @type Function
+     * @category Objects
+     * @param {Object} object The object to iterate over.
+     * @param {Function} [callback=identity] The function called per iteration.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Object} Returns `object`.
+     * @example
+     *
+     * function Shape() {
+     *   this.x = 0;
+     *   this.y = 0;
+     * }
+     *
+     * Shape.prototype.move = function(x, y) {
+     *   this.x += x;
+     *   this.y += y;
+     * };
+     *
+     * _.forIn(new Shape, function(value, key) {
+     *   console.log(key);
+     * });
+     * // => logs 'x', 'y', and 'move' (property order is not guaranteed across environments)
+     */
+    var forIn = function(collection, callback, thisArg) {
+      var index, iterable = collection, result = iterable;
+      if (!iterable) return result;
+      if (!objectTypes[typeof iterable]) return result;
+      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
+        for (index in iterable) {
+          if (callback(iterable[index], index, collection) === false) return result;
+        }
+      return result
+    };
+
+    /**
+     * This method is like `_.forIn` except that it iterates over elements
+     * of a `collection` in the opposite order.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The object to iterate over.
+     * @param {Function} [callback=identity] The function called per iteration.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Object} Returns `object`.
+     * @example
+     *
+     * function Shape() {
+     *   this.x = 0;
+     *   this.y = 0;
+     * }
+     *
+     * Shape.prototype.move = function(x, y) {
+     *   this.x += x;
+     *   this.y += y;
+     * };
+     *
+     * _.forInRight(new Shape, function(value, key) {
+     *   console.log(key);
+     * });
+     * // => logs 'move', 'y', and 'x' assuming `_.forIn ` logs 'x', 'y', and 'move'
+     */
+    function forInRight(object, callback, thisArg) {
+      var pairs = [];
+
+      forIn(object, function(value, key) {
+        pairs.push(key, value);
+      });
+
+      var length = pairs.length;
+      callback = baseCreateCallback(callback, thisArg, 3);
+      while (length--) {
+        if (callback(pairs[length--], pairs[length], object) === false) {
+          break;
+        }
+      }
+      return object;
+    }
+
+    /**
+     * Iterates over own enumerable properties of an object, executing the callback
+     * for each property. The callback is bound to `thisArg` and invoked with three
+     * arguments; (value, key, object). Callbacks may exit iteration early by
+     * explicitly returning `false`.
+     *
+     * @static
+     * @memberOf _
+     * @type Function
+     * @category Objects
+     * @param {Object} object The object to iterate over.
+     * @param {Function} [callback=identity] The function called per iteration.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Object} Returns `object`.
+     * @example
+     *
+     * _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
+     *   console.log(key);
+     * });
+     * // => logs '0', '1', and 'length' (property order is not guaranteed across environments)
+     */
+    var forOwn = function(collection, callback, thisArg) {
+      var index, iterable = collection, result = iterable;
+      if (!iterable) return result;
+      if (!objectTypes[typeof iterable]) return result;
+      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
+        var ownIndex = -1,
+            ownProps = objectTypes[typeof iterable] && keys(iterable),
+            length = ownProps ? ownProps.length : 0;
+
+        while (++ownIndex < length) {
+          index = ownProps[ownIndex];
+          if (callback(iterable[index], index, collection) === false) return result;
+        }
+      return result
+    };
+
+    /**
+     * This method is like `_.forOwn` except that it iterates over elements
+     * of a `collection` in the opposite order.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The object to iterate over.
+     * @param {Function} [callback=identity] The function called per iteration.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Object} Returns `object`.
+     * @example
+     *
+     * _.forOwnRight({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
+     *   console.log(key);
+     * });
+     * // => logs 'length', '1', and '0' assuming `_.forOwn` logs '0', '1', and 'length'
+     */
+    function forOwnRight(object, callback, thisArg) {
+      var props = keys(object),
+          length = props.length;
+
+      callback = baseCreateCallback(callback, thisArg, 3);
+      while (length--) {
+        var key = props[length];
+        if (callback(object[key], key, object) === false) {
+          break;
+        }
+      }
+      return object;
+    }
+
+    /**
+     * Creates a sorted array of property names of all enumerable properties,
+     * own and inherited, of `object` that have function values.
+     *
+     * @static
+     * @memberOf _
+     * @alias methods
+     * @category Objects
+     * @param {Object} object The object to inspect.
+     * @returns {Array} Returns an array of property names that have function values.
+     * @example
+     *
+     * _.functions(_);
+     * // => ['all', 'any', 'bind', 'bindAll', 'clone', 'compact', 'compose', ...]
+     */
+    function functions(object) {
+      var result = [];
+      forIn(object, function(value, key) {
+        if (isFunction(value)) {
+          result.push(key);
+        }
+      });
+      return result.sort();
+    }
+
+    /**
+     * Checks if the specified property name exists as a direct property of `object`,
+     * instead of an inherited property.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The object to inspect.
+     * @param {string} key The name of the property to check.
+     * @returns {boolean} Returns `true` if key is a direct property, else `false`.
+     * @example
+     *
+     * _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b');
+     * // => true
+     */
+    function has(object, key) {
+      return object ? hasOwnProperty.call(object, key) : false;
+    }
+
+    /**
+     * Creates an object composed of the inverted keys and values of the given object.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The object to invert.
+     * @returns {Object} Returns the created inverted object.
+     * @example
+     *
+     * _.invert({ 'first': 'fred', 'second': 'barney' });
+     * // => { 'fred': 'first', 'barney': 'second' }
+     */
+    function invert(object) {
+      var index = -1,
+          props = keys(object),
+          length = props.length,
+          result = {};
+
+      while (++index < length) {
+        var key = props[index];
+        result[object[key]] = key;
+      }
+      return result;
+    }
+
+    /**
+     * Checks if `value` is a boolean value.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is a boolean value, else `false`.
+     * @example
+     *
+     * _.isBoolean(null);
+     * // => false
+     */
+    function isBoolean(value) {
+      return value === true || value === false ||
+        value && typeof value == 'object' && toString.call(value) == boolClass || false;
+    }
+
+    /**
+     * Checks if `value` is a date.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is a date, else `false`.
+     * @example
+     *
+     * _.isDate(new Date);
+     * // => true
+     */
+    function isDate(value) {
+      return value && typeof value == 'object' && toString.call(value) == dateClass || false;
+    }
+
+    /**
+     * Checks if `value` is a DOM element.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is a DOM element, else `false`.
+     * @example
+     *
+     * _.isElement(document.body);
+     * // => true
+     */
+    function isElement(value) {
+      return value && value.nodeType === 1 || false;
+    }
+
+    /**
+     * Checks if `value` is empty. Arrays, strings, or `arguments` objects with a
+     * length of `0` and objects with no own enumerable properties are considered
+     * "empty".
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Array|Object|string} value The value to inspect.
+     * @returns {boolean} Returns `true` if the `value` is empty, else `false`.
+     * @example
+     *
+     * _.isEmpty([1, 2, 3]);
+     * // => false
+     *
+     * _.isEmpty({});
+     * // => true
+     *
+     * _.isEmpty('');
+     * // => true
+     */
+    function isEmpty(value) {
+      var result = true;
+      if (!value) {
+        return result;
+      }
+      var className = toString.call(value),
+          length = value.length;
+
+      if ((className == arrayClass || className == stringClass || className == argsClass ) ||
+          (className == objectClass && typeof length == 'number' && isFunction(value.splice))) {
+        return !length;
+      }
+      forOwn(value, function() {
+        return (result = false);
+      });
+      return result;
+    }
+
+    /**
+     * Performs a deep comparison between two values to determine if they are
+     * equivalent to each other. If a callback is provided it will be executed
+     * to compare values. If the callback returns `undefined` comparisons will
+     * be handled by the method instead. The callback is bound to `thisArg` and
+     * invoked with two arguments; (a, b).
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} a The value to compare.
+     * @param {*} b The other value to compare.
+     * @param {Function} [callback] The function to customize comparing values.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+     * @example
+     *
+     * var object = { 'name': 'fred' };
+     * var copy = { 'name': 'fred' };
+     *
+     * object == copy;
+     * // => false
+     *
+     * _.isEqual(object, copy);
+     * // => true
+     *
+     * var words = ['hello', 'goodbye'];
+     * var otherWords = ['hi', 'goodbye'];
+     *
+     * _.isEqual(words, otherWords, function(a, b) {
+     *   var reGreet = /^(?:hello|hi)$/i,
+     *       aGreet = _.isString(a) && reGreet.test(a),
+     *       bGreet = _.isString(b) && reGreet.test(b);
+     *
+     *   return (aGreet || bGreet) ? (aGreet == bGreet) : undefined;
+     * });
+     * // => true
+     */
+    function isEqual(a, b, callback, thisArg) {
+      return baseIsEqual(a, b, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 2));
+    }
+
+    /**
+     * Checks if `value` is, or can be coerced to, a finite number.
+     *
+     * Note: This is not the same as native `isFinite` which will return true for
+     * booleans and empty strings. See http://es5.github.io/#x15.1.2.5.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is finite, else `false`.
+     * @example
+     *
+     * _.isFinite(-101);
+     * // => true
+     *
+     * _.isFinite('10');
+     * // => true
+     *
+     * _.isFinite(true);
+     * // => false
+     *
+     * _.isFinite('');
+     * // => false
+     *
+     * _.isFinite(Infinity);
+     * // => false
+     */
+    function isFinite(value) {
+      return nativeIsFinite(value) && !nativeIsNaN(parseFloat(value));
+    }
+
+    /**
+     * Checks if `value` is a function.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is a function, else `false`.
+     * @example
+     *
+     * _.isFunction(_);
+     * // => true
+     */
+    function isFunction(value) {
+      return typeof value == 'function';
+    }
+
+    /**
+     * Checks if `value` is the language type of Object.
+     * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is an object, else `false`.
+     * @example
+     *
+     * _.isObject({});
+     * // => true
+     *
+     * _.isObject([1, 2, 3]);
+     * // => true
+     *
+     * _.isObject(1);
+     * // => false
+     */
+    function isObject(value) {
+      // check if the value is the ECMAScript language type of Object
+      // http://es5.github.io/#x8
+      // and avoid a V8 bug
+      // http://code.google.com/p/v8/issues/detail?id=2291
+      return !!(value && objectTypes[typeof value]);
+    }
+
+    /**
+     * Checks if `value` is `NaN`.
+     *
+     * Note: This is not the same as native `isNaN` which will return `true` for
+     * `undefined` and other non-numeric values. See http://es5.github.io/#x15.1.2.4.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is `NaN`, else `false`.
+     * @example
+     *
+     * _.isNaN(NaN);
+     * // => true
+     *
+     * _.isNaN(new Number(NaN));
+     * // => true
+     *
+     * isNaN(undefined);
+     * // => true
+     *
+     * _.isNaN(undefined);
+     * // => false
+     */
+    function isNaN(value) {
+      // `NaN` as a primitive is the only value that is not equal to itself
+      // (perform the [[Class]] check first to avoid errors with some host objects in IE)
+      return isNumber(value) && value != +value;
+    }
+
+    /**
+     * Checks if `value` is `null`.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is `null`, else `false`.
+     * @example
+     *
+     * _.isNull(null);
+     * // => true
+     *
+     * _.isNull(undefined);
+     * // => false
+     */
+    function isNull(value) {
+      return value === null;
+    }
+
+    /**
+     * Checks if `value` is a number.
+     *
+     * Note: `NaN` is considered a number. See http://es5.github.io/#x8.5.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is a number, else `false`.
+     * @example
+     *
+     * _.isNumber(8.4 * 5);
+     * // => true
+     */
+    function isNumber(value) {
+      return typeof value == 'number' ||
+        value && typeof value == 'object' && toString.call(value) == numberClass || false;
+    }
+
+    /**
+     * Checks if `value` is an object created by the `Object` constructor.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
+     * @example
+     *
+     * function Shape() {
+     *   this.x = 0;
+     *   this.y = 0;
+     * }
+     *
+     * _.isPlainObject(new Shape);
+     * // => false
+     *
+     * _.isPlainObject([1, 2, 3]);
+     * // => false
+     *
+     * _.isPlainObject({ 'x': 0, 'y': 0 });
+     * // => true
+     */
+    var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) {
+      if (!(value && toString.call(value) == objectClass)) {
+        return false;
+      }
+      var valueOf = value.valueOf,
+          objProto = isNative(valueOf) && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto);
+
+      return objProto
+        ? (value == objProto || getPrototypeOf(value) == objProto)
+        : shimIsPlainObject(value);
+    };
+
+    /**
+     * Checks if `value` is a regular expression.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is a regular expression, else `false`.
+     * @example
+     *
+     * _.isRegExp(/fred/);
+     * // => true
+     */
+    function isRegExp(value) {
+      return value && typeof value == 'object' && toString.call(value) == regexpClass || false;
+    }
+
+    /**
+     * Checks if `value` is a string.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is a string, else `false`.
+     * @example
+     *
+     * _.isString('fred');
+     * // => true
+     */
+    function isString(value) {
+      return typeof value == 'string' ||
+        value && typeof value == 'object' && toString.call(value) == stringClass || false;
+    }
+
+    /**
+     * Checks if `value` is `undefined`.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if the `value` is `undefined`, else `false`.
+     * @example
+     *
+     * _.isUndefined(void 0);
+     * // => true
+     */
+    function isUndefined(value) {
+      return typeof value == 'undefined';
+    }
+
+    /**
+     * Creates an object with the same keys as `object` and values generated by
+     * running each own enumerable property of `object` through the callback.
+     * The callback is bound to `thisArg` and invoked with three arguments;
+     * (value, key, object).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The object to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a new object with values of the results of each `callback` execution.
+     * @example
+     *
+     * _.mapValues({ 'a': 1, 'b': 2, 'c': 3} , function(num) { return num * 3; });
+     * // => { 'a': 3, 'b': 6, 'c': 9 }
+     *
+     * var characters = {
+     *   'fred': { 'name': 'fred', 'age': 40 },
+     *   'pebbles': { 'name': 'pebbles', 'age': 1 }
+     * };
+     *
+     * // using "_.pluck" callback shorthand
+     * _.mapValues(characters, 'age');
+     * // => { 'fred': 40, 'pebbles': 1 }
+     */
+    function mapValues(object, callback, thisArg) {
+      var result = {};
+      callback = lodash.createCallback(callback, thisArg, 3);
+
+      forOwn(object, function(value, key, object) {
+        result[key] = callback(value, key, object);
+      });
+      return result;
+    }
+
+    /**
+     * Recursively merges own enumerable properties of the source object(s), that
+     * don't resolve to `undefined` into the destination object. Subsequent sources
+     * will overwrite property assignments of previous sources. If a callback is
+     * provided it will be executed to produce the merged values of the destination
+     * and source properties. If the callback returns `undefined` merging will
+     * be handled by the method instead. The callback is bound to `thisArg` and
+     * invoked with two arguments; (objectValue, sourceValue).
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The destination object.
+     * @param {...Object} [source] The source objects.
+     * @param {Function} [callback] The function to customize merging properties.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Object} Returns the destination object.
+     * @example
+     *
+     * var names = {
+     *   'characters': [
+     *     { 'name': 'barney' },
+     *     { 'name': 'fred' }
+     *   ]
+     * };
+     *
+     * var ages = {
+     *   'characters': [
+     *     { 'age': 36 },
+     *     { 'age': 40 }
+     *   ]
+     * };
+     *
+     * _.merge(names, ages);
+     * // => { 'characters': [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred', 'age': 40 }] }
+     *
+     * var food = {
+     *   'fruits': ['apple'],
+     *   'vegetables': ['beet']
+     * };
+     *
+     * var otherFood = {
+     *   'fruits': ['banana'],
+     *   'vegetables': ['carrot']
+     * };
+     *
+     * _.merge(food, otherFood, function(a, b) {
+     *   return _.isArray(a) ? a.concat(b) : undefined;
+     * });
+     * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot] }
+     */
+    function merge(object) {
+      var args = arguments,
+          length = 2;
+
+      if (!isObject(object)) {
+        return object;
+      }
+      // allows working with `_.reduce` and `_.reduceRight` without using
+      // their `index` and `collection` arguments
+      if (typeof args[2] != 'number') {
+        length = args.length;
+      }
+      if (length > 3 && typeof args[length - 2] == 'function') {
+        var callback = baseCreateCallback(args[--length - 1], args[length--], 2);
+      } else if (length > 2 && typeof args[length - 1] == 'function') {
+        callback = args[--length];
+      }
+      var sources = slice(arguments, 1, length),
+          index = -1,
+          stackA = getArray(),
+          stackB = getArray();
+
+      while (++index < length) {
+        baseMerge(object, sources[index], callback, stackA, stackB);
+      }
+      releaseArray(stackA);
+      releaseArray(stackB);
+      return object;
+    }
+
+    /**
+     * Creates a shallow clone of `object` excluding the specified properties.
+     * Property names may be specified as individual arguments or as arrays of
+     * property names. If a callback is provided it will be executed for each
+     * property of `object` omitting the properties the callback returns truey
+     * for. The callback is bound to `thisArg` and invoked with three arguments;
+     * (value, key, object).
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The source object.
+     * @param {Function|...string|string[]} [callback] The properties to omit or the
+     *  function called per iteration.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Object} Returns an object without the omitted properties.
+     * @example
+     *
+     * _.omit({ 'name': 'fred', 'age': 40 }, 'age');
+     * // => { 'name': 'fred' }
+     *
+     * _.omit({ 'name': 'fred', 'age': 40 }, function(value) {
+     *   return typeof value == 'number';
+     * });
+     * // => { 'name': 'fred' }
+     */
+    function omit(object, callback, thisArg) {
+      var result = {};
+      if (typeof callback != 'function') {
+        var props = [];
+        forIn(object, function(value, key) {
+          props.push(key);
+        });
+        props = baseDifference(props, baseFlatten(arguments, true, false, 1));
+
+        var index = -1,
+            length = props.length;
+
+        while (++index < length) {
+          var key = props[index];
+          result[key] = object[key];
+        }
+      } else {
+        callback = lodash.createCallback(callback, thisArg, 3);
+        forIn(object, function(value, key, object) {
+          if (!callback(value, key, object)) {
+            result[key] = value;
+          }
+        });
+      }
+      return result;
+    }
+
+    /**
+     * Creates a two dimensional array of an object's key-value pairs,
+     * i.e. `[[key1, value1], [key2, value2]]`.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The object to inspect.
+     * @returns {Array} Returns new array of key-value pairs.
+     * @example
+     *
+     * _.pairs({ 'barney': 36, 'fred': 40 });
+     * // => [['barney', 36], ['fred', 40]] (property order is not guaranteed across environments)
+     */
+    function pairs(object) {
+      var index = -1,
+          props = keys(object),
+          length = props.length,
+          result = Array(length);
+
+      while (++index < length) {
+        var key = props[index];
+        result[index] = [key, object[key]];
+      }
+      return result;
+    }
+
+    /**
+     * Creates a shallow clone of `object` composed of the specified properties.
+     * Property names may be specified as individual arguments or as arrays of
+     * property names. If a callback is provided it will be executed for each
+     * property of `object` picking the properties the callback returns truey
+     * for. The callback is bound to `thisArg` and invoked with three arguments;
+     * (value, key, object).
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The source object.
+     * @param {Function|...string|string[]} [callback] The function called per
+     *  iteration or property names to pick, specified as individual property
+     *  names or arrays of property names.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Object} Returns an object composed of the picked properties.
+     * @example
+     *
+     * _.pick({ 'name': 'fred', '_userid': 'fred1' }, 'name');
+     * // => { 'name': 'fred' }
+     *
+     * _.pick({ 'name': 'fred', '_userid': 'fred1' }, function(value, key) {
+     *   return key.charAt(0) != '_';
+     * });
+     * // => { 'name': 'fred' }
+     */
+    function pick(object, callback, thisArg) {
+      var result = {};
+      if (typeof callback != 'function') {
+        var index = -1,
+            props = baseFlatten(arguments, true, false, 1),
+            length = isObject(object) ? props.length : 0;
+
+        while (++index < length) {
+          var key = props[index];
+          if (key in object) {
+            result[key] = object[key];
+          }
+        }
+      } else {
+        callback = lodash.createCallback(callback, thisArg, 3);
+        forIn(object, function(value, key, object) {
+          if (callback(value, key, object)) {
+            result[key] = value;
+          }
+        });
+      }
+      return result;
+    }
+
+    /**
+     * An alternative to `_.reduce` this method transforms `object` to a new
+     * `accumulator` object which is the result of running each of its own
+     * enumerable properties through a callback, with each callback execution
+     * potentially mutating the `accumulator` object. The callback is bound to
+     * `thisArg` and invoked with four arguments; (accumulator, value, key, object).
+     * Callbacks may exit iteration early by explicitly returning `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Array|Object} object The object to iterate over.
+     * @param {Function} [callback=identity] The function called per iteration.
+     * @param {*} [accumulator] The custom accumulator value.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {*} Returns the accumulated value.
+     * @example
+     *
+     * var squares = _.transform([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], function(result, num) {
+     *   num *= num;
+     *   if (num % 2) {
+     *     return result.push(num) < 3;
+     *   }
+     * });
+     * // => [1, 9, 25]
+     *
+     * var mapped = _.transform({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) {
+     *   result[key] = num * 3;
+     * });
+     * // => { 'a': 3, 'b': 6, 'c': 9 }
+     */
+    function transform(object, callback, accumulator, thisArg) {
+      var isArr = isArray(object);
+      if (accumulator == null) {
+        if (isArr) {
+          accumulator = [];
+        } else {
+          var ctor = object && object.constructor,
+              proto = ctor && ctor.prototype;
+
+          accumulator = baseCreate(proto);
+        }
+      }
+      if (callback) {
+        callback = lodash.createCallback(callback, thisArg, 4);
+        (isArr ? forEach : forOwn)(object, function(value, index, object) {
+          return callback(accumulator, value, index, object);
+        });
+      }
+      return accumulator;
+    }
+
+    /**
+     * Creates an array composed of the own enumerable property values of `object`.
+     *
+     * @static
+     * @memberOf _
+     * @category Objects
+     * @param {Object} object The object to inspect.
+     * @returns {Array} Returns an array of property values.
+     * @example
+     *
+     * _.values({ 'one': 1, 'two': 2, 'three': 3 });
+     * // => [1, 2, 3] (property order is not guaranteed across environments)
+     */
+    function values(object) {
+      var index = -1,
+          props = keys(object),
+          length = props.length,
+          result = Array(length);
+
+      while (++index < length) {
+        result[index] = object[props[index]];
+      }
+      return result;
+    }
+
+    /*--------------------------------------------------------------------------*/
+
+    /**
+     * Creates an array of elements from the specified indexes, or keys, of the
+     * `collection`. Indexes may be specified as individual arguments or as arrays
+     * of indexes.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {...(number|number[]|string|string[])} [index] The indexes of `collection`
+     *   to retrieve, specified as individual indexes or arrays of indexes.
+     * @returns {Array} Returns a new array of elements corresponding to the
+     *  provided indexes.
+     * @example
+     *
+     * _.at(['a', 'b', 'c', 'd', 'e'], [0, 2, 4]);
+     * // => ['a', 'c', 'e']
+     *
+     * _.at(['fred', 'barney', 'pebbles'], 0, 2);
+     * // => ['fred', 'pebbles']
+     */
+    function at(collection) {
+      var args = arguments,
+          index = -1,
+          props = baseFlatten(args, true, false, 1),
+          length = (args[2] && args[2][args[1]] === collection) ? 1 : props.length,
+          result = Array(length);
+
+      while(++index < length) {
+        result[index] = collection[props[index]];
+      }
+      return result;
+    }
+
+    /**
+     * Checks if a given value is present in a collection using strict equality
+     * for comparisons, i.e. `===`. If `fromIndex` is negative, it is used as the
+     * offset from the end of the collection.
+     *
+     * @static
+     * @memberOf _
+     * @alias include
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {*} target The value to check for.
+     * @param {number} [fromIndex=0] The index to search from.
+     * @returns {boolean} Returns `true` if the `target` element is found, else `false`.
+     * @example
+     *
+     * _.contains([1, 2, 3], 1);
+     * // => true
+     *
+     * _.contains([1, 2, 3], 1, 2);
+     * // => false
+     *
+     * _.contains({ 'name': 'fred', 'age': 40 }, 'fred');
+     * // => true
+     *
+     * _.contains('pebbles', 'eb');
+     * // => true
+     */
+    function contains(collection, target, fromIndex) {
+      var index = -1,
+          indexOf = getIndexOf(),
+          length = collection ? collection.length : 0,
+          result = false;
+
+      fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex) || 0;
+      if (isArray(collection)) {
+        result = indexOf(collection, target, fromIndex) > -1;
+      } else if (typeof length == 'number') {
+        result = (isString(collection) ? collection.indexOf(target, fromIndex) : indexOf(collection, target, fromIndex)) > -1;
+      } else {
+        forOwn(collection, function(value) {
+          if (++index >= fromIndex) {
+            return !(result = value === target);
+          }
+        });
+      }
+      return result;
+    }
+
+    /**
+     * Creates an object composed of keys generated from the results of running
+     * each element of `collection` through the callback. The corresponding value
+     * of each key is the number of times the key was returned by the callback.
+     * The callback is bound to `thisArg` and invoked with three arguments;
+     * (value, index|key, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Object} Returns the composed aggregate object.
+     * @example
+     *
+     * _.countBy([4.3, 6.1, 6.4], function(num) { return Math.floor(num); });
+     * // => { '4': 1, '6': 2 }
+     *
+     * _.countBy([4.3, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
+     * // => { '4': 1, '6': 2 }
+     *
+     * _.countBy(['one', 'two', 'three'], 'length');
+     * // => { '3': 2, '5': 1 }
+     */
+    var countBy = createAggregator(function(result, value, key) {
+      (hasOwnProperty.call(result, key) ? result[key]++ : result[key] = 1);
+    });
+
+    /**
+     * Checks if the given callback returns truey value for **all** elements of
+     * a collection. The callback is bound to `thisArg` and invoked with three
+     * arguments; (value, index|key, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @alias all
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {boolean} Returns `true` if all elements passed the callback check,
+     *  else `false`.
+     * @example
+     *
+     * _.every([true, 1, null, 'yes']);
+     * // => false
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36 },
+     *   { 'name': 'fred',   'age': 40 }
+     * ];
+     *
+     * // using "_.pluck" callback shorthand
+     * _.every(characters, 'age');
+     * // => true
+     *
+     * // using "_.where" callback shorthand
+     * _.every(characters, { 'age': 36 });
+     * // => false
+     */
+    function every(collection, callback, thisArg) {
+      var result = true;
+      callback = lodash.createCallback(callback, thisArg, 3);
+
+      var index = -1,
+          length = collection ? collection.length : 0;
+
+      if (typeof length == 'number') {
+        while (++index < length) {
+          if (!(result = !!callback(collection[index], index, collection))) {
+            break;
+          }
+        }
+      } else {
+        forOwn(collection, function(value, index, collection) {
+          return (result = !!callback(value, index, collection));
+        });
+      }
+      return result;
+    }
+
+    /**
+     * Iterates over elements of a collection, returning an array of all elements
+     * the callback returns truey for. The callback is bound to `thisArg` and
+     * invoked with three arguments; (value, index|key, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @alias select
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a new array of elements that passed the callback check.
+     * @example
+     *
+     * var evens = _.filter([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
+     * // => [2, 4, 6]
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36, 'blocked': false },
+     *   { 'name': 'fred',   'age': 40, 'blocked': true }
+     * ];
+     *
+     * // using "_.pluck" callback shorthand
+     * _.filter(characters, 'blocked');
+     * // => [{ 'name': 'fred', 'age': 40, 'blocked': true }]
+     *
+     * // using "_.where" callback shorthand
+     * _.filter(characters, { 'age': 36 });
+     * // => [{ 'name': 'barney', 'age': 36, 'blocked': false }]
+     */
+    function filter(collection, callback, thisArg) {
+      var result = [];
+      callback = lodash.createCallback(callback, thisArg, 3);
+
+      var index = -1,
+          length = collection ? collection.length : 0;
+
+      if (typeof length == 'number') {
+        while (++index < length) {
+          var value = collection[index];
+          if (callback(value, index, collection)) {
+            result.push(value);
+          }
+        }
+      } else {
+        forOwn(collection, function(value, index, collection) {
+          if (callback(value, index, collection)) {
+            result.push(value);
+          }
+        });
+      }
+      return result;
+    }
+
+    /**
+     * Iterates over elements of a collection, returning the first element that
+     * the callback returns truey for. The callback is bound to `thisArg` and
+     * invoked with three arguments; (value, index|key, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @alias detect, findWhere
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {*} Returns the found element, else `undefined`.
+     * @example
+     *
+     * var characters = [
+     *   { 'name': 'barney',  'age': 36, 'blocked': false },
+     *   { 'name': 'fred',    'age': 40, 'blocked': true },
+     *   { 'name': 'pebbles', 'age': 1,  'blocked': false }
+     * ];
+     *
+     * _.find(characters, function(chr) {
+     *   return chr.age < 40;
+     * });
+     * // => { 'name': 'barney', 'age': 36, 'blocked': false }
+     *
+     * // using "_.where" callback shorthand
+     * _.find(characters, { 'age': 1 });
+     * // =>  { 'name': 'pebbles', 'age': 1, 'blocked': false }
+     *
+     * // using "_.pluck" callback shorthand
+     * _.find(characters, 'blocked');
+     * // => { 'name': 'fred', 'age': 40, 'blocked': true }
+     */
+    function find(collection, callback, thisArg) {
+      callback = lodash.createCallback(callback, thisArg, 3);
+
+      var index = -1,
+          length = collection ? collection.length : 0;
+
+      if (typeof length == 'number') {
+        while (++index < length) {
+          var value = collection[index];
+          if (callback(value, index, collection)) {
+            return value;
+          }
+        }
+      } else {
+        var result;
+        forOwn(collection, function(value, index, collection) {
+          if (callback(value, index, collection)) {
+            result = value;
+            return false;
+          }
+        });
+        return result;
+      }
+    }
+
+    /**
+     * This method is like `_.find` except that it iterates over elements
+     * of a `collection` from right to left.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {*} Returns the found element, else `undefined`.
+     * @example
+     *
+     * _.findLast([1, 2, 3, 4], function(num) {
+     *   return num % 2 == 1;
+     * });
+     * // => 3
+     */
+    function findLast(collection, callback, thisArg) {
+      var result;
+      callback = lodash.createCallback(callback, thisArg, 3);
+      forEachRight(collection, function(value, index, collection) {
+        if (callback(value, index, collection)) {
+          result = value;
+          return false;
+        }
+      });
+      return result;
+    }
+
+    /**
+     * Iterates over elements of a collection, executing the callback for each
+     * element. The callback is bound to `thisArg` and invoked with three arguments;
+     * (value, index|key, collection). Callbacks may exit iteration early by
+     * explicitly returning `false`.
+     *
+     * Note: As with other "Collections" methods, objects with a `length` property
+     * are iterated like arrays. To avoid this behavior `_.forIn` or `_.forOwn`
+     * may be used for object iteration.
+     *
+     * @static
+     * @memberOf _
+     * @alias each
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function} [callback=identity] The function called per iteration.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array|Object|string} Returns `collection`.
+     * @example
+     *
+     * _([1, 2, 3]).forEach(function(num) { console.log(num); }).join(',');
+     * // => logs each number and returns '1,2,3'
+     *
+     * _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { console.log(num); });
+     * // => logs each number and returns the object (property order is not guaranteed across environments)
+     */
+    function forEach(collection, callback, thisArg) {
+      var index = -1,
+          length = collection ? collection.length : 0;
+
+      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
+      if (typeof length == 'number') {
+        while (++index < length) {
+          if (callback(collection[index], index, collection) === false) {
+            break;
+          }
+        }
+      } else {
+        forOwn(collection, callback);
+      }
+      return collection;
+    }
+
+    /**
+     * This method is like `_.forEach` except that it iterates over elements
+     * of a `collection` from right to left.
+     *
+     * @static
+     * @memberOf _
+     * @alias eachRight
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function} [callback=identity] The function called per iteration.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array|Object|string} Returns `collection`.
+     * @example
+     *
+     * _([1, 2, 3]).forEachRight(function(num) { console.log(num); }).join(',');
+     * // => logs each number from right to left and returns '3,2,1'
+     */
+    function forEachRight(collection, callback, thisArg) {
+      var length = collection ? collection.length : 0;
+      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
+      if (typeof length == 'number') {
+        while (length--) {
+          if (callback(collection[length], length, collection) === false) {
+            break;
+          }
+        }
+      } else {
+        var props = keys(collection);
+        length = props.length;
+        forOwn(collection, function(value, key, collection) {
+          key = props ? props[--length] : --length;
+          return callback(collection[key], key, collection);
+        });
+      }
+      return collection;
+    }
+
+    /**
+     * Creates an object composed of keys generated from the results of running
+     * each element of a collection through the callback. The corresponding value
+     * of each key is an array of the elements responsible for generating the key.
+     * The callback is bound to `thisArg` and invoked with three arguments;
+     * (value, index|key, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Object} Returns the composed aggregate object.
+     * @example
+     *
+     * _.groupBy([4.2, 6.1, 6.4], function(num) { return Math.floor(num); });
+     * // => { '4': [4.2], '6': [6.1, 6.4] }
+     *
+     * _.groupBy([4.2, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
+     * // => { '4': [4.2], '6': [6.1, 6.4] }
+     *
+     * // using "_.pluck" callback shorthand
+     * _.groupBy(['one', 'two', 'three'], 'length');
+     * // => { '3': ['one', 'two'], '5': ['three'] }
+     */
+    var groupBy = createAggregator(function(result, value, key) {
+      (hasOwnProperty.call(result, key) ? result[key] : result[key] = []).push(value);
+    });
+
+    /**
+     * Creates an object composed of keys generated from the results of running
+     * each element of the collection through the given callback. The corresponding
+     * value of each key is the last element responsible for generating the key.
+     * The callback is bound to `thisArg` and invoked with three arguments;
+     * (value, index|key, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Object} Returns the composed aggregate object.
+     * @example
+     *
+     * var keys = [
+     *   { 'dir': 'left', 'code': 97 },
+     *   { 'dir': 'right', 'code': 100 }
+     * ];
+     *
+     * _.indexBy(keys, 'dir');
+     * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
+     *
+     * _.indexBy(keys, function(key) { return String.fromCharCode(key.code); });
+     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
+     *
+     * _.indexBy(characters, function(key) { this.fromCharCode(key.code); }, String);
+     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
+     */
+    var indexBy = createAggregator(function(result, value, key) {
+      result[key] = value;
+    });
+
+    /**
+     * Invokes the method named by `methodName` on each element in the `collection`
+     * returning an array of the results of each invoked method. Additional arguments
+     * will be provided to each invoked method. If `methodName` is a function it
+     * will be invoked for, and `this` bound to, each element in the `collection`.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|string} methodName The name of the method to invoke or
+     *  the function invoked per iteration.
+     * @param {...*} [arg] Arguments to invoke the method with.
+     * @returns {Array} Returns a new array of the results of each invoked method.
+     * @example
+     *
+     * _.invoke([[5, 1, 7], [3, 2, 1]], 'sort');
+     * // => [[1, 5, 7], [1, 2, 3]]
+     *
+     * _.invoke([123, 456], String.prototype.split, '');
+     * // => [['1', '2', '3'], ['4', '5', '6']]
+     */
+    function invoke(collection, methodName) {
+      var args = slice(arguments, 2),
+          index = -1,
+          isFunc = typeof methodName == 'function',
+          length = collection ? collection.length : 0,
+          result = Array(typeof length == 'number' ? length : 0);
+
+      forEach(collection, function(value) {
+        result[++index] = (isFunc ? methodName : value[methodName]).apply(value, args);
+      });
+      return result;
+    }
+
+    /**
+     * Creates an array of values by running each element in the collection
+     * through the callback. The callback is bound to `thisArg` and invoked with
+     * three arguments; (value, index|key, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @alias collect
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a new array of the results of each `callback` execution.
+     * @example
+     *
+     * _.map([1, 2, 3], function(num) { return num * 3; });
+     * // => [3, 6, 9]
+     *
+     * _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { return num * 3; });
+     * // => [3, 6, 9] (property order is not guaranteed across environments)
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36 },
+     *   { 'name': 'fred',   'age': 40 }
+     * ];
+     *
+     * // using "_.pluck" callback shorthand
+     * _.map(characters, 'name');
+     * // => ['barney', 'fred']
+     */
+    function map(collection, callback, thisArg) {
+      var index = -1,
+          length = collection ? collection.length : 0;
+
+      callback = lodash.createCallback(callback, thisArg, 3);
+      if (typeof length == 'number') {
+        var result = Array(length);
+        while (++index < length) {
+          result[index] = callback(collection[index], index, collection);
+        }
+      } else {
+        result = [];
+        forOwn(collection, function(value, key, collection) {
+          result[++index] = callback(value, key, collection);
+        });
+      }
+      return result;
+    }
+
+    /**
+     * Retrieves the maximum value of a collection. If the collection is empty or
+     * falsey `-Infinity` is returned. If a callback is provided it will be executed
+     * for each value in the collection to generate the criterion by which the value
+     * is ranked. The callback is bound to `thisArg` and invoked with three
+     * arguments; (value, index, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {*} Returns the maximum value.
+     * @example
+     *
+     * _.max([4, 2, 8, 6]);
+     * // => 8
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36 },
+     *   { 'name': 'fred',   'age': 40 }
+     * ];
+     *
+     * _.max(characters, function(chr) { return chr.age; });
+     * // => { 'name': 'fred', 'age': 40 };
+     *
+     * // using "_.pluck" callback shorthand
+     * _.max(characters, 'age');
+     * // => { 'name': 'fred', 'age': 40 };
+     */
+    function max(collection, callback, thisArg) {
+      var computed = -Infinity,
+          result = computed;
+
+      // allows working with functions like `_.map` without using
+      // their `index` argument as a callback
+      if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
+        callback = null;
+      }
+      if (callback == null && isArray(collection)) {
+        var index = -1,
+            length = collection.length;
+
+        while (++index < length) {
+          var value = collection[index];
+          if (value > result) {
+            result = value;
+          }
+        }
+      } else {
+        callback = (callback == null && isString(collection))
+          ? charAtCallback
+          : lodash.createCallback(callback, thisArg, 3);
+
+        forEach(collection, function(value, index, collection) {
+          var current = callback(value, index, collection);
+          if (current > computed) {
+            computed = current;
+            result = value;
+          }
+        });
+      }
+      return result;
+    }
+
+    /**
+     * Retrieves the minimum value of a collection. If the collection is empty or
+     * falsey `Infinity` is returned. If a callback is provided it will be executed
+     * for each value in the collection to generate the criterion by which the value
+     * is ranked. The callback is bound to `thisArg` and invoked with three
+     * arguments; (value, index, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {*} Returns the minimum value.
+     * @example
+     *
+     * _.min([4, 2, 8, 6]);
+     * // => 2
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36 },
+     *   { 'name': 'fred',   'age': 40 }
+     * ];
+     *
+     * _.min(characters, function(chr) { return chr.age; });
+     * // => { 'name': 'barney', 'age': 36 };
+     *
+     * // using "_.pluck" callback shorthand
+     * _.min(characters, 'age');
+     * // => { 'name': 'barney', 'age': 36 };
+     */
+    function min(collection, callback, thisArg) {
+      var computed = Infinity,
+          result = computed;
+
+      // allows working with functions like `_.map` without using
+      // their `index` argument as a callback
+      if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
+        callback = null;
+      }
+      if (callback == null && isArray(collection)) {
+        var index = -1,
+            length = collection.length;
+
+        while (++index < length) {
+          var value = collection[index];
+          if (value < result) {
+            result = value;
+          }
+        }
+      } else {
+        callback = (callback == null && isString(collection))
+          ? charAtCallback
+          : lodash.createCallback(callback, thisArg, 3);
+
+        forEach(collection, function(value, index, collection) {
+          var current = callback(value, index, collection);
+          if (current < computed) {
+            computed = current;
+            result = value;
+          }
+        });
+      }
+      return result;
+    }
+
+    /**
+     * Retrieves the value of a specified property from all elements in the collection.
+     *
+     * @static
+     * @memberOf _
+     * @type Function
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {string} property The name of the property to pluck.
+     * @returns {Array} Returns a new array of property values.
+     * @example
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36 },
+     *   { 'name': 'fred',   'age': 40 }
+     * ];
+     *
+     * _.pluck(characters, 'name');
+     * // => ['barney', 'fred']
+     */
+    var pluck = map;
+
+    /**
+     * Reduces a collection to a value which is the accumulated result of running
+     * each element in the collection through the callback, where each successive
+     * callback execution consumes the return value of the previous execution. If
+     * `accumulator` is not provided the first element of the collection will be
+     * used as the initial `accumulator` value. The callback is bound to `thisArg`
+     * and invoked with four arguments; (accumulator, value, index|key, collection).
+     *
+     * @static
+     * @memberOf _
+     * @alias foldl, inject
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function} [callback=identity] The function called per iteration.
+     * @param {*} [accumulator] Initial value of the accumulator.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {*} Returns the accumulated value.
+     * @example
+     *
+     * var sum = _.reduce([1, 2, 3], function(sum, num) {
+     *   return sum + num;
+     * });
+     * // => 6
+     *
+     * var mapped = _.reduce({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) {
+     *   result[key] = num * 3;
+     *   return result;
+     * }, {});
+     * // => { 'a': 3, 'b': 6, 'c': 9 }
+     */
+    function reduce(collection, callback, accumulator, thisArg) {
+      if (!collection) return accumulator;
+      var noaccum = arguments.length < 3;
+      callback = lodash.createCallback(callback, thisArg, 4);
+
+      var index = -1,
+          length = collection.length;
+
+      if (typeof length == 'number') {
+        if (noaccum) {
+          accumulator = collection[++index];
+        }
+        while (++index < length) {
+          accumulator = callback(accumulator, collection[index], index, collection);
+        }
+      } else {
+        forOwn(collection, function(value, index, collection) {
+          accumulator = noaccum
+            ? (noaccum = false, value)
+            : callback(accumulator, value, index, collection)
+        });
+      }
+      return accumulator;
+    }
+
+    /**
+     * This method is like `_.reduce` except that it iterates over elements
+     * of a `collection` from right to left.
+     *
+     * @static
+     * @memberOf _
+     * @alias foldr
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function} [callback=identity] The function called per iteration.
+     * @param {*} [accumulator] Initial value of the accumulator.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {*} Returns the accumulated value.
+     * @example
+     *
+     * var list = [[0, 1], [2, 3], [4, 5]];
+     * var flat = _.reduceRight(list, function(a, b) { return a.concat(b); }, []);
+     * // => [4, 5, 2, 3, 0, 1]
+     */
+    function reduceRight(collection, callback, accumulator, thisArg) {
+      var noaccum = arguments.length < 3;
+      callback = lodash.createCallback(callback, thisArg, 4);
+      forEachRight(collection, function(value, index, collection) {
+        accumulator = noaccum
+          ? (noaccum = false, value)
+          : callback(accumulator, value, index, collection);
+      });
+      return accumulator;
+    }
+
+    /**
+     * The opposite of `_.filter` this method returns the elements of a
+     * collection that the callback does **not** return truey for.
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a new array of elements that failed the callback check.
+     * @example
+     *
+     * var odds = _.reject([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
+     * // => [1, 3, 5]
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36, 'blocked': false },
+     *   { 'name': 'fred',   'age': 40, 'blocked': true }
+     * ];
+     *
+     * // using "_.pluck" callback shorthand
+     * _.reject(characters, 'blocked');
+     * // => [{ 'name': 'barney', 'age': 36, 'blocked': false }]
+     *
+     * // using "_.where" callback shorthand
+     * _.reject(characters, { 'age': 36 });
+     * // => [{ 'name': 'fred', 'age': 40, 'blocked': true }]
+     */
+    function reject(collection, callback, thisArg) {
+      callback = lodash.createCallback(callback, thisArg, 3);
+      return filter(collection, function(value, index, collection) {
+        return !callback(value, index, collection);
+      });
+    }
+
+    /**
+     * Retrieves a random element or `n` random elements from a collection.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to sample.
+     * @param {number} [n] The number of elements to sample.
+     * @param- {Object} [guard] Allows working with functions like `_.map`
+     *  without using their `index` arguments as `n`.
+     * @returns {Array} Returns the random sample(s) of `collection`.
+     * @example
+     *
+     * _.sample([1, 2, 3, 4]);
+     * // => 2
+     *
+     * _.sample([1, 2, 3, 4], 2);
+     * // => [3, 1]
+     */
+    function sample(collection, n, guard) {
+      if (collection && typeof collection.length != 'number') {
+        collection = values(collection);
+      }
+      if (n == null || guard) {
+        return collection ? collection[baseRandom(0, collection.length - 1)] : undefined;
+      }
+      var result = shuffle(collection);
+      result.length = nativeMin(nativeMax(0, n), result.length);
+      return result;
+    }
+
+    /**
+     * Creates an array of shuffled values, using a version of the Fisher-Yates
+     * shuffle. See http://en.wikipedia.org/wiki/Fisher-Yates_shuffle.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to shuffle.
+     * @returns {Array} Returns a new shuffled collection.
+     * @example
+     *
+     * _.shuffle([1, 2, 3, 4, 5, 6]);
+     * // => [4, 1, 6, 3, 5, 2]
+     */
+    function shuffle(collection) {
+      var index = -1,
+          length = collection ? collection.length : 0,
+          result = Array(typeof length == 'number' ? length : 0);
+
+      forEach(collection, function(value) {
+        var rand = baseRandom(0, ++index);
+        result[index] = result[rand];
+        result[rand] = value;
+      });
+      return result;
+    }
+
+    /**
+     * Gets the size of the `collection` by returning `collection.length` for arrays
+     * and array-like objects or the number of own enumerable properties for objects.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to inspect.
+     * @returns {number} Returns `collection.length` or number of own enumerable properties.
+     * @example
+     *
+     * _.size([1, 2]);
+     * // => 2
+     *
+     * _.size({ 'one': 1, 'two': 2, 'three': 3 });
+     * // => 3
+     *
+     * _.size('pebbles');
+     * // => 7
+     */
+    function size(collection) {
+      var length = collection ? collection.length : 0;
+      return typeof length == 'number' ? length : keys(collection).length;
+    }
+
+    /**
+     * Checks if the callback returns a truey value for **any** element of a
+     * collection. The function returns as soon as it finds a passing value and
+     * does not iterate over the entire collection. The callback is bound to
+     * `thisArg` and invoked with three arguments; (value, index|key, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @alias any
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {boolean} Returns `true` if any element passed the callback check,
+     *  else `false`.
+     * @example
+     *
+     * _.some([null, 0, 'yes', false], Boolean);
+     * // => true
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36, 'blocked': false },
+     *   { 'name': 'fred',   'age': 40, 'blocked': true }
+     * ];
+     *
+     * // using "_.pluck" callback shorthand
+     * _.some(characters, 'blocked');
+     * // => true
+     *
+     * // using "_.where" callback shorthand
+     * _.some(characters, { 'age': 1 });
+     * // => false
+     */
+    function some(collection, callback, thisArg) {
+      var result;
+      callback = lodash.createCallback(callback, thisArg, 3);
+
+      var index = -1,
+          length = collection ? collection.length : 0;
+
+      if (typeof length == 'number') {
+        while (++index < length) {
+          if ((result = callback(collection[index], index, collection))) {
+            break;
+          }
+        }
+      } else {
+        forOwn(collection, function(value, index, collection) {
+          return !(result = callback(value, index, collection));
+        });
+      }
+      return !!result;
+    }
+
+    /**
+     * Creates an array of elements, sorted in ascending order by the results of
+     * running each element in a collection through the callback. This method
+     * performs a stable sort, that is, it will preserve the original sort order
+     * of equal elements. The callback is bound to `thisArg` and invoked with
+     * three arguments; (value, index|key, collection).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an array of property names is provided for `callback` the collection
+     * will be sorted by each property value.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Array|Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a new array of sorted elements.
+     * @example
+     *
+     * _.sortBy([1, 2, 3], function(num) { return Math.sin(num); });
+     * // => [3, 1, 2]
+     *
+     * _.sortBy([1, 2, 3], function(num) { return this.sin(num); }, Math);
+     * // => [3, 1, 2]
+     *
+     * var characters = [
+     *   { 'name': 'barney',  'age': 36 },
+     *   { 'name': 'fred',    'age': 40 },
+     *   { 'name': 'barney',  'age': 26 },
+     *   { 'name': 'fred',    'age': 30 }
+     * ];
+     *
+     * // using "_.pluck" callback shorthand
+     * _.map(_.sortBy(characters, 'age'), _.values);
+     * // => [['barney', 26], ['fred', 30], ['barney', 36], ['fred', 40]]
+     *
+     * // sorting by multiple properties
+     * _.map(_.sortBy(characters, ['name', 'age']), _.values);
+     * // = > [['barney', 26], ['barney', 36], ['fred', 30], ['fred', 40]]
+     */
+    function sortBy(collection, callback, thisArg) {
+      var index = -1,
+          isArr = isArray(callback),
+          length = collection ? collection.length : 0,
+          result = Array(typeof length == 'number' ? length : 0);
+
+      if (!isArr) {
+        callback = lodash.createCallback(callback, thisArg, 3);
+      }
+      forEach(collection, function(value, key, collection) {
+        var object = result[++index] = getObject();
+        if (isArr) {
+          object.criteria = map(callback, function(key) { return value[key]; });
+        } else {
+          (object.criteria = getArray())[0] = callback(value, key, collection);
+        }
+        object.index = index;
+        object.value = value;
+      });
+
+      length = result.length;
+      result.sort(compareAscending);
+      while (length--) {
+        var object = result[length];
+        result[length] = object.value;
+        if (!isArr) {
+          releaseArray(object.criteria);
+        }
+        releaseObject(object);
+      }
+      return result;
+    }
+
+    /**
+     * Converts the `collection` to an array.
+     *
+     * @static
+     * @memberOf _
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to convert.
+     * @returns {Array} Returns the new converted array.
+     * @example
+     *
+     * (function() { return _.toArray(arguments).slice(1); })(1, 2, 3, 4);
+     * // => [2, 3, 4]
+     */
+    function toArray(collection) {
+      if (collection && typeof collection.length == 'number') {
+        return slice(collection);
+      }
+      return values(collection);
+    }
+
+    /**
+     * Performs a deep comparison of each element in a `collection` to the given
+     * `properties` object, returning an array of all elements that have equivalent
+     * property values.
+     *
+     * @static
+     * @memberOf _
+     * @type Function
+     * @category Collections
+     * @param {Array|Object|string} collection The collection to iterate over.
+     * @param {Object} props The object of property values to filter by.
+     * @returns {Array} Returns a new array of elements that have the given properties.
+     * @example
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36, 'pets': ['hoppy'] },
+     *   { 'name': 'fred',   'age': 40, 'pets': ['baby puss', 'dino'] }
+     * ];
+     *
+     * _.where(characters, { 'age': 36 });
+     * // => [{ 'name': 'barney', 'age': 36, 'pets': ['hoppy'] }]
+     *
+     * _.where(characters, { 'pets': ['dino'] });
+     * // => [{ 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] }]
+     */
+    var where = filter;
+
+    /*--------------------------------------------------------------------------*/
+
+    /**
+     * Creates an array with all falsey values removed. The values `false`, `null`,
+     * `0`, `""`, `undefined`, and `NaN` are all falsey.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to compact.
+     * @returns {Array} Returns a new array of filtered values.
+     * @example
+     *
+     * _.compact([0, 1, false, 2, '', 3]);
+     * // => [1, 2, 3]
+     */
+    function compact(array) {
+      var index = -1,
+          length = array ? array.length : 0,
+          result = [];
+
+      while (++index < length) {
+        var value = array[index];
+        if (value) {
+          result.push(value);
+        }
+      }
+      return result;
+    }
+
+    /**
+     * Creates an array excluding all values of the provided arrays using strict
+     * equality for comparisons, i.e. `===`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to process.
+     * @param {...Array} [values] The arrays of values to exclude.
+     * @returns {Array} Returns a new array of filtered values.
+     * @example
+     *
+     * _.difference([1, 2, 3, 4, 5], [5, 2, 10]);
+     * // => [1, 3, 4]
+     */
+    function difference(array) {
+      return baseDifference(array, baseFlatten(arguments, true, true, 1));
+    }
+
+    /**
+     * This method is like `_.find` except that it returns the index of the first
+     * element that passes the callback check, instead of the element itself.
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to search.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {number} Returns the index of the found element, else `-1`.
+     * @example
+     *
+     * var characters = [
+     *   { 'name': 'barney',  'age': 36, 'blocked': false },
+     *   { 'name': 'fred',    'age': 40, 'blocked': true },
+     *   { 'name': 'pebbles', 'age': 1,  'blocked': false }
+     * ];
+     *
+     * _.findIndex(characters, function(chr) {
+     *   return chr.age < 20;
+     * });
+     * // => 2
+     *
+     * // using "_.where" callback shorthand
+     * _.findIndex(characters, { 'age': 36 });
+     * // => 0
+     *
+     * // using "_.pluck" callback shorthand
+     * _.findIndex(characters, 'blocked');
+     * // => 1
+     */
+    function findIndex(array, callback, thisArg) {
+      var index = -1,
+          length = array ? array.length : 0;
+
+      callback = lodash.createCallback(callback, thisArg, 3);
+      while (++index < length) {
+        if (callback(array[index], index, array)) {
+          return index;
+        }
+      }
+      return -1;
+    }
+
+    /**
+     * This method is like `_.findIndex` except that it iterates over elements
+     * of a `collection` from right to left.
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to search.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {number} Returns the index of the found element, else `-1`.
+     * @example
+     *
+     * var characters = [
+     *   { 'name': 'barney',  'age': 36, 'blocked': true },
+     *   { 'name': 'fred',    'age': 40, 'blocked': false },
+     *   { 'name': 'pebbles', 'age': 1,  'blocked': true }
+     * ];
+     *
+     * _.findLastIndex(characters, function(chr) {
+     *   return chr.age > 30;
+     * });
+     * // => 1
+     *
+     * // using "_.where" callback shorthand
+     * _.findLastIndex(characters, { 'age': 36 });
+     * // => 0
+     *
+     * // using "_.pluck" callback shorthand
+     * _.findLastIndex(characters, 'blocked');
+     * // => 2
+     */
+    function findLastIndex(array, callback, thisArg) {
+      var length = array ? array.length : 0;
+      callback = lodash.createCallback(callback, thisArg, 3);
+      while (length--) {
+        if (callback(array[length], length, array)) {
+          return length;
+        }
+      }
+      return -1;
+    }
+
+    /**
+     * Gets the first element or first `n` elements of an array. If a callback
+     * is provided elements at the beginning of the array are returned as long
+     * as the callback returns truey. The callback is bound to `thisArg` and
+     * invoked with three arguments; (value, index, array).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @alias head, take
+     * @category Arrays
+     * @param {Array} array The array to query.
+     * @param {Function|Object|number|string} [callback] The function called
+     *  per element or the number of elements to return. If a property name or
+     *  object is provided it will be used to create a "_.pluck" or "_.where"
+     *  style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {*} Returns the first element(s) of `array`.
+     * @example
+     *
+     * _.first([1, 2, 3]);
+     * // => 1
+     *
+     * _.first([1, 2, 3], 2);
+     * // => [1, 2]
+     *
+     * _.first([1, 2, 3], function(num) {
+     *   return num < 3;
+     * });
+     * // => [1, 2]
+     *
+     * var characters = [
+     *   { 'name': 'barney',  'blocked': true,  'employer': 'slate' },
+     *   { 'name': 'fred',    'blocked': false, 'employer': 'slate' },
+     *   { 'name': 'pebbles', 'blocked': true,  'employer': 'na' }
+     * ];
+     *
+     * // using "_.pluck" callback shorthand
+     * _.first(characters, 'blocked');
+     * // => [{ 'name': 'barney', 'blocked': true, 'employer': 'slate' }]
+     *
+     * // using "_.where" callback shorthand
+     * _.pluck(_.first(characters, { 'employer': 'slate' }), 'name');
+     * // => ['barney', 'fred']
+     */
+    function first(array, callback, thisArg) {
+      var n = 0,
+          length = array ? array.length : 0;
+
+      if (typeof callback != 'number' && callback != null) {
+        var index = -1;
+        callback = lodash.createCallback(callback, thisArg, 3);
+        while (++index < length && callback(array[index], index, array)) {
+          n++;
+        }
+      } else {
+        n = callback;
+        if (n == null || thisArg) {
+          return array ? array[0] : undefined;
+        }
+      }
+      return slice(array, 0, nativeMin(nativeMax(0, n), length));
+    }
+
+    /**
+     * Flattens a nested array (the nesting can be to any depth). If `isShallow`
+     * is truey, the array will only be flattened a single level. If a callback
+     * is provided each element of the array is passed through the callback before
+     * flattening. The callback is bound to `thisArg` and invoked with three
+     * arguments; (value, index, array).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to flatten.
+     * @param {boolean} [isShallow=false] A flag to restrict flattening to a single level.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a new flattened array.
+     * @example
+     *
+     * _.flatten([1, [2], [3, [[4]]]]);
+     * // => [1, 2, 3, 4];
+     *
+     * _.flatten([1, [2], [3, [[4]]]], true);
+     * // => [1, 2, 3, [[4]]];
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 30, 'pets': ['hoppy'] },
+     *   { 'name': 'fred',   'age': 40, 'pets': ['baby puss', 'dino'] }
+     * ];
+     *
+     * // using "_.pluck" callback shorthand
+     * _.flatten(characters, 'pets');
+     * // => ['hoppy', 'baby puss', 'dino']
+     */
+    function flatten(array, isShallow, callback, thisArg) {
+      // juggle arguments
+      if (typeof isShallow != 'boolean' && isShallow != null) {
+        thisArg = callback;
+        callback = (typeof isShallow != 'function' && thisArg && thisArg[isShallow] === array) ? null : isShallow;
+        isShallow = false;
+      }
+      if (callback != null) {
+        array = map(array, callback, thisArg);
+      }
+      return baseFlatten(array, isShallow);
+    }
+
+    /**
+     * Gets the index at which the first occurrence of `value` is found using
+     * strict equality for comparisons, i.e. `===`. If the array is already sorted
+     * providing `true` for `fromIndex` will run a faster binary search.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to search.
+     * @param {*} value The value to search for.
+     * @param {boolean|number} [fromIndex=0] The index to search from or `true`
+     *  to perform a binary search on a sorted array.
+     * @returns {number} Returns the index of the matched value or `-1`.
+     * @example
+     *
+     * _.indexOf([1, 2, 3, 1, 2, 3], 2);
+     * // => 1
+     *
+     * _.indexOf([1, 2, 3, 1, 2, 3], 2, 3);
+     * // => 4
+     *
+     * _.indexOf([1, 1, 2, 2, 3, 3], 2, true);
+     * // => 2
+     */
+    function indexOf(array, value, fromIndex) {
+      if (typeof fromIndex == 'number') {
+        var length = array ? array.length : 0;
+        fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex || 0);
+      } else if (fromIndex) {
+        var index = sortedIndex(array, value);
+        return array[index] === value ? index : -1;
+      }
+      return baseIndexOf(array, value, fromIndex);
+    }
+
+    /**
+     * Gets all but the last element or last `n` elements of an array. If a
+     * callback is provided elements at the end of the array are excluded from
+     * the result as long as the callback returns truey. The callback is bound
+     * to `thisArg` and invoked with three arguments; (value, index, array).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to query.
+     * @param {Function|Object|number|string} [callback=1] The function called
+     *  per element or the number of elements to exclude. If a property name or
+     *  object is provided it will be used to create a "_.pluck" or "_.where"
+     *  style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a slice of `array`.
+     * @example
+     *
+     * _.initial([1, 2, 3]);
+     * // => [1, 2]
+     *
+     * _.initial([1, 2, 3], 2);
+     * // => [1]
+     *
+     * _.initial([1, 2, 3], function(num) {
+     *   return num > 1;
+     * });
+     * // => [1]
+     *
+     * var characters = [
+     *   { 'name': 'barney',  'blocked': false, 'employer': 'slate' },
+     *   { 'name': 'fred',    'blocked': true,  'employer': 'slate' },
+     *   { 'name': 'pebbles', 'blocked': true,  'employer': 'na' }
+     * ];
+     *
+     * // using "_.pluck" callback shorthand
+     * _.initial(characters, 'blocked');
+     * // => [{ 'name': 'barney',  'blocked': false, 'employer': 'slate' }]
+     *
+     * // using "_.where" callback shorthand
+     * _.pluck(_.initial(characters, { 'employer': 'na' }), 'name');
+     * // => ['barney', 'fred']
+     */
+    function initial(array, callback, thisArg) {
+      var n = 0,
+          length = array ? array.length : 0;
+
+      if (typeof callback != 'number' && callback != null) {
+        var index = length;
+        callback = lodash.createCallback(callback, thisArg, 3);
+        while (index-- && callback(array[index], index, array)) {
+          n++;
+        }
+      } else {
+        n = (callback == null || thisArg) ? 1 : callback || n;
+      }
+      return slice(array, 0, nativeMin(nativeMax(0, length - n), length));
+    }
+
+    /**
+     * Creates an array of unique values present in all provided arrays using
+     * strict equality for comparisons, i.e. `===`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {...Array} [array] The arrays to inspect.
+     * @returns {Array} Returns an array of shared values.
+     * @example
+     *
+     * _.intersection([1, 2, 3], [5, 2, 1, 4], [2, 1]);
+     * // => [1, 2]
+     */
+    function intersection() {
+      var args = [],
+          argsIndex = -1,
+          argsLength = arguments.length,
+          caches = getArray(),
+          indexOf = getIndexOf(),
+          trustIndexOf = indexOf === baseIndexOf,
+          seen = getArray();
+
+      while (++argsIndex < argsLength) {
+        var value = arguments[argsIndex];
+        if (isArray(value) || isArguments(value)) {
+          args.push(value);
+          caches.push(trustIndexOf && value.length >= largeArraySize &&
+            createCache(argsIndex ? args[argsIndex] : seen));
+        }
+      }
+      var array = args[0],
+          index = -1,
+          length = array ? array.length : 0,
+          result = [];
+
+      outer:
+      while (++index < length) {
+        var cache = caches[0];
+        value = array[index];
+
+        if ((cache ? cacheIndexOf(cache, value) : indexOf(seen, value)) < 0) {
+          argsIndex = argsLength;
+          (cache || seen).push(value);
+          while (--argsIndex) {
+            cache = caches[argsIndex];
+            if ((cache ? cacheIndexOf(cache, value) : indexOf(args[argsIndex], value)) < 0) {
+              continue outer;
+            }
+          }
+          result.push(value);
+        }
+      }
+      while (argsLength--) {
+        cache = caches[argsLength];
+        if (cache) {
+          releaseObject(cache);
+        }
+      }
+      releaseArray(caches);
+      releaseArray(seen);
+      return result;
+    }
+
+    /**
+     * Gets the last element or last `n` elements of an array. If a callback is
+     * provided elements at the end of the array are returned as long as the
+     * callback returns truey. The callback is bound to `thisArg` and invoked
+     * with three arguments; (value, index, array).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to query.
+     * @param {Function|Object|number|string} [callback] The function called
+     *  per element or the number of elements to return. If a property name or
+     *  object is provided it will be used to create a "_.pluck" or "_.where"
+     *  style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {*} Returns the last element(s) of `array`.
+     * @example
+     *
+     * _.last([1, 2, 3]);
+     * // => 3
+     *
+     * _.last([1, 2, 3], 2);
+     * // => [2, 3]
+     *
+     * _.last([1, 2, 3], function(num) {
+     *   return num > 1;
+     * });
+     * // => [2, 3]
+     *
+     * var characters = [
+     *   { 'name': 'barney',  'blocked': false, 'employer': 'slate' },
+     *   { 'name': 'fred',    'blocked': true,  'employer': 'slate' },
+     *   { 'name': 'pebbles', 'blocked': true,  'employer': 'na' }
+     * ];
+     *
+     * // using "_.pluck" callback shorthand
+     * _.pluck(_.last(characters, 'blocked'), 'name');
+     * // => ['fred', 'pebbles']
+     *
+     * // using "_.where" callback shorthand
+     * _.last(characters, { 'employer': 'na' });
+     * // => [{ 'name': 'pebbles', 'blocked': true, 'employer': 'na' }]
+     */
+    function last(array, callback, thisArg) {
+      var n = 0,
+          length = array ? array.length : 0;
+
+      if (typeof callback != 'number' && callback != null) {
+        var index = length;
+        callback = lodash.createCallback(callback, thisArg, 3);
+        while (index-- && callback(array[index], index, array)) {
+          n++;
+        }
+      } else {
+        n = callback;
+        if (n == null || thisArg) {
+          return array ? array[length - 1] : undefined;
+        }
+      }
+      return slice(array, nativeMax(0, length - n));
+    }
+
+    /**
+     * Gets the index at which the last occurrence of `value` is found using strict
+     * equality for comparisons, i.e. `===`. If `fromIndex` is negative, it is used
+     * as the offset from the end of the collection.
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to search.
+     * @param {*} value The value to search for.
+     * @param {number} [fromIndex=array.length-1] The index to search from.
+     * @returns {number} Returns the index of the matched value or `-1`.
+     * @example
+     *
+     * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2);
+     * // => 4
+     *
+     * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2, 3);
+     * // => 1
+     */
+    function lastIndexOf(array, value, fromIndex) {
+      var index = array ? array.length : 0;
+      if (typeof fromIndex == 'number') {
+        index = (fromIndex < 0 ? nativeMax(0, index + fromIndex) : nativeMin(fromIndex, index - 1)) + 1;
+      }
+      while (index--) {
+        if (array[index] === value) {
+          return index;
+        }
+      }
+      return -1;
+    }
+
+    /**
+     * Removes all provided values from the given array using strict equality for
+     * comparisons, i.e. `===`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to modify.
+     * @param {...*} [value] The values to remove.
+     * @returns {Array} Returns `array`.
+     * @example
+     *
+     * var array = [1, 2, 3, 1, 2, 3];
+     * _.pull(array, 2, 3);
+     * console.log(array);
+     * // => [1, 1]
+     */
+    function pull(array) {
+      var args = arguments,
+          argsIndex = 0,
+          argsLength = args.length,
+          length = array ? array.length : 0;
+
+      while (++argsIndex < argsLength) {
+        var index = -1,
+            value = args[argsIndex];
+        while (++index < length) {
+          if (array[index] === value) {
+            splice.call(array, index--, 1);
+            length--;
+          }
+        }
+      }
+      return array;
+    }
+
+    /**
+     * Creates an array of numbers (positive and/or negative) progressing from
+     * `start` up to but not including `end`. If `start` is less than `stop` a
+     * zero-length range is created unless a negative `step` is specified.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {number} [start=0] The start of the range.
+     * @param {number} end The end of the range.
+     * @param {number} [step=1] The value to increment or decrement by.
+     * @returns {Array} Returns a new range array.
+     * @example
+     *
+     * _.range(4);
+     * // => [0, 1, 2, 3]
+     *
+     * _.range(1, 5);
+     * // => [1, 2, 3, 4]
+     *
+     * _.range(0, 20, 5);
+     * // => [0, 5, 10, 15]
+     *
+     * _.range(0, -4, -1);
+     * // => [0, -1, -2, -3]
+     *
+     * _.range(1, 4, 0);
+     * // => [1, 1, 1]
+     *
+     * _.range(0);
+     * // => []
+     */
+    function range(start, end, step) {
+      start = +start || 0;
+      step = typeof step == 'number' ? step : (+step || 1);
+
+      if (end == null) {
+        end = start;
+        start = 0;
+      }
+      // use `Array(length)` so engines like Chakra and V8 avoid slower modes
+      // http://youtu.be/XAqIpGU8ZZk#t=17m25s
+      var index = -1,
+          length = nativeMax(0, ceil((end - start) / (step || 1))),
+          result = Array(length);
+
+      while (++index < length) {
+        result[index] = start;
+        start += step;
+      }
+      return result;
+    }
+
+    /**
+     * Removes all elements from an array that the callback returns truey for
+     * and returns an array of removed elements. The callback is bound to `thisArg`
+     * and invoked with three arguments; (value, index, array).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to modify.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a new array of removed elements.
+     * @example
+     *
+     * var array = [1, 2, 3, 4, 5, 6];
+     * var evens = _.remove(array, function(num) { return num % 2 == 0; });
+     *
+     * console.log(array);
+     * // => [1, 3, 5]
+     *
+     * console.log(evens);
+     * // => [2, 4, 6]
+     */
+    function remove(array, callback, thisArg) {
+      var index = -1,
+          length = array ? array.length : 0,
+          result = [];
+
+      callback = lodash.createCallback(callback, thisArg, 3);
+      while (++index < length) {
+        var value = array[index];
+        if (callback(value, index, array)) {
+          result.push(value);
+          splice.call(array, index--, 1);
+          length--;
+        }
+      }
+      return result;
+    }
+
+    /**
+     * The opposite of `_.initial` this method gets all but the first element or
+     * first `n` elements of an array. If a callback function is provided elements
+     * at the beginning of the array are excluded from the result as long as the
+     * callback returns truey. The callback is bound to `thisArg` and invoked
+     * with three arguments; (value, index, array).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @alias drop, tail
+     * @category Arrays
+     * @param {Array} array The array to query.
+     * @param {Function|Object|number|string} [callback=1] The function called
+     *  per element or the number of elements to exclude. If a property name or
+     *  object is provided it will be used to create a "_.pluck" or "_.where"
+     *  style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a slice of `array`.
+     * @example
+     *
+     * _.rest([1, 2, 3]);
+     * // => [2, 3]
+     *
+     * _.rest([1, 2, 3], 2);
+     * // => [3]
+     *
+     * _.rest([1, 2, 3], function(num) {
+     *   return num < 3;
+     * });
+     * // => [3]
+     *
+     * var characters = [
+     *   { 'name': 'barney',  'blocked': true,  'employer': 'slate' },
+     *   { 'name': 'fred',    'blocked': false,  'employer': 'slate' },
+     *   { 'name': 'pebbles', 'blocked': true, 'employer': 'na' }
+     * ];
+     *
+     * // using "_.pluck" callback shorthand
+     * _.pluck(_.rest(characters, 'blocked'), 'name');
+     * // => ['fred', 'pebbles']
+     *
+     * // using "_.where" callback shorthand
+     * _.rest(characters, { 'employer': 'slate' });
+     * // => [{ 'name': 'pebbles', 'blocked': true, 'employer': 'na' }]
+     */
+    function rest(array, callback, thisArg) {
+      if (typeof callback != 'number' && callback != null) {
+        var n = 0,
+            index = -1,
+            length = array ? array.length : 0;
+
+        callback = lodash.createCallback(callback, thisArg, 3);
+        while (++index < length && callback(array[index], index, array)) {
+          n++;
+        }
+      } else {
+        n = (callback == null || thisArg) ? 1 : nativeMax(0, callback);
+      }
+      return slice(array, n);
+    }
+
+    /**
+     * Uses a binary search to determine the smallest index at which a value
+     * should be inserted into a given sorted array in order to maintain the sort
+     * order of the array. If a callback is provided it will be executed for
+     * `value` and each element of `array` to compute their sort ranking. The
+     * callback is bound to `thisArg` and invoked with one argument; (value).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to inspect.
+     * @param {*} value The value to evaluate.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {number} Returns the index at which `value` should be inserted
+     *  into `array`.
+     * @example
+     *
+     * _.sortedIndex([20, 30, 50], 40);
+     * // => 2
+     *
+     * // using "_.pluck" callback shorthand
+     * _.sortedIndex([{ 'x': 20 }, { 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x');
+     * // => 2
+     *
+     * var dict = {
+     *   'wordToNumber': { 'twenty': 20, 'thirty': 30, 'fourty': 40, 'fifty': 50 }
+     * };
+     *
+     * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
+     *   return dict.wordToNumber[word];
+     * });
+     * // => 2
+     *
+     * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
+     *   return this.wordToNumber[word];
+     * }, dict);
+     * // => 2
+     */
+    function sortedIndex(array, value, callback, thisArg) {
+      var low = 0,
+          high = array ? array.length : low;
+
+      // explicitly reference `identity` for better inlining in Firefox
+      callback = callback ? lodash.createCallback(callback, thisArg, 1) : identity;
+      value = callback(value);
+
+      while (low < high) {
+        var mid = (low + high) >>> 1;
+        (callback(array[mid]) < value)
+          ? low = mid + 1
+          : high = mid;
+      }
+      return low;
+    }
+
+    /**
+     * Creates an array of unique values, in order, of the provided arrays using
+     * strict equality for comparisons, i.e. `===`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {...Array} [array] The arrays to inspect.
+     * @returns {Array} Returns an array of combined values.
+     * @example
+     *
+     * _.union([1, 2, 3], [5, 2, 1, 4], [2, 1]);
+     * // => [1, 2, 3, 5, 4]
+     */
+    function union() {
+      return baseUniq(baseFlatten(arguments, true, true));
+    }
+
+    /**
+     * Creates a duplicate-value-free version of an array using strict equality
+     * for comparisons, i.e. `===`. If the array is sorted, providing
+     * `true` for `isSorted` will use a faster algorithm. If a callback is provided
+     * each element of `array` is passed through the callback before uniqueness
+     * is computed. The callback is bound to `thisArg` and invoked with three
+     * arguments; (value, index, array).
+     *
+     * If a property name is provided for `callback` the created "_.pluck" style
+     * callback will return the property value of the given element.
+     *
+     * If an object is provided for `callback` the created "_.where" style callback
+     * will return `true` for elements that have the properties of the given object,
+     * else `false`.
+     *
+     * @static
+     * @memberOf _
+     * @alias unique
+     * @category Arrays
+     * @param {Array} array The array to process.
+     * @param {boolean} [isSorted=false] A flag to indicate that `array` is sorted.
+     * @param {Function|Object|string} [callback=identity] The function called
+     *  per iteration. If a property name or object is provided it will be used
+     *  to create a "_.pluck" or "_.where" style callback, respectively.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns a duplicate-value-free array.
+     * @example
+     *
+     * _.uniq([1, 2, 1, 3, 1]);
+     * // => [1, 2, 3]
+     *
+     * _.uniq([1, 1, 2, 2, 3], true);
+     * // => [1, 2, 3]
+     *
+     * _.uniq(['A', 'b', 'C', 'a', 'B', 'c'], function(letter) { return letter.toLowerCase(); });
+     * // => ['A', 'b', 'C']
+     *
+     * _.uniq([1, 2.5, 3, 1.5, 2, 3.5], function(num) { return this.floor(num); }, Math);
+     * // => [1, 2.5, 3]
+     *
+     * // using "_.pluck" callback shorthand
+     * _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
+     * // => [{ 'x': 1 }, { 'x': 2 }]
+     */
+    function uniq(array, isSorted, callback, thisArg) {
+      // juggle arguments
+      if (typeof isSorted != 'boolean' && isSorted != null) {
+        thisArg = callback;
+        callback = (typeof isSorted != 'function' && thisArg && thisArg[isSorted] === array) ? null : isSorted;
+        isSorted = false;
+      }
+      if (callback != null) {
+        callback = lodash.createCallback(callback, thisArg, 3);
+      }
+      return baseUniq(array, isSorted, callback);
+    }
+
+    /**
+     * Creates an array excluding all provided values using strict equality for
+     * comparisons, i.e. `===`.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {Array} array The array to filter.
+     * @param {...*} [value] The values to exclude.
+     * @returns {Array} Returns a new array of filtered values.
+     * @example
+     *
+     * _.without([1, 2, 1, 0, 3, 1, 4], 0, 1);
+     * // => [2, 3, 4]
+     */
+    function without(array) {
+      return baseDifference(array, slice(arguments, 1));
+    }
+
+    /**
+     * Creates an array that is the symmetric difference of the provided arrays.
+     * See http://en.wikipedia.org/wiki/Symmetric_difference.
+     *
+     * @static
+     * @memberOf _
+     * @category Arrays
+     * @param {...Array} [array] The arrays to inspect.
+     * @returns {Array} Returns an array of values.
+     * @example
+     *
+     * _.xor([1, 2, 3], [5, 2, 1, 4]);
+     * // => [3, 5, 4]
+     *
+     * _.xor([1, 2, 5], [2, 3, 5], [3, 4, 5]);
+     * // => [1, 4, 5]
+     */
+    function xor() {
+      var index = -1,
+          length = arguments.length;
+
+      while (++index < length) {
+        var array = arguments[index];
+        if (isArray(array) || isArguments(array)) {
+          var result = result
+            ? baseUniq(baseDifference(result, array).concat(baseDifference(array, result)))
+            : array;
+        }
+      }
+      return result || [];
+    }
+
+    /**
+     * Creates an array of grouped elements, the first of which contains the first
+     * elements of the given arrays, the second of which contains the second
+     * elements of the given arrays, and so on.
+     *
+     * @static
+     * @memberOf _
+     * @alias unzip
+     * @category Arrays
+     * @param {...Array} [array] Arrays to process.
+     * @returns {Array} Returns a new array of grouped elements.
+     * @example
+     *
+     * _.zip(['fred', 'barney'], [30, 40], [true, false]);
+     * // => [['fred', 30, true], ['barney', 40, false]]
+     */
+    function zip() {
+      var array = arguments.length > 1 ? arguments : arguments[0],
+          index = -1,
+          length = array ? max(pluck(array, 'length')) : 0,
+          result = Array(length < 0 ? 0 : length);
+
+      while (++index < length) {
+        result[index] = pluck(array, index);
+      }
+      return result;
+    }
+
+    /**
+     * Creates an object composed from arrays of `keys` and `values`. Provide
+     * either a single two dimensional array, i.e. `[[key1, value1], [key2, value2]]`
+     * or two arrays, one of `keys` and one of corresponding `values`.
+     *
+     * @static
+     * @memberOf _
+     * @alias object
+     * @category Arrays
+     * @param {Array} keys The array of keys.
+     * @param {Array} [values=[]] The array of values.
+     * @returns {Object} Returns an object composed of the given keys and
+     *  corresponding values.
+     * @example
+     *
+     * _.zipObject(['fred', 'barney'], [30, 40]);
+     * // => { 'fred': 30, 'barney': 40 }
+     */
+    function zipObject(keys, values) {
+      var index = -1,
+          length = keys ? keys.length : 0,
+          result = {};
+
+      if (!values && length && !isArray(keys[0])) {
+        values = [];
+      }
+      while (++index < length) {
+        var key = keys[index];
+        if (values) {
+          result[key] = values[index];
+        } else if (key) {
+          result[key[0]] = key[1];
+        }
+      }
+      return result;
+    }
+
+    /*--------------------------------------------------------------------------*/
+
+    /**
+     * Creates a function that executes `func`, with  the `this` binding and
+     * arguments of the created function, only after being called `n` times.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {number} n The number of times the function must be called before
+     *  `func` is executed.
+     * @param {Function} func The function to restrict.
+     * @returns {Function} Returns the new restricted function.
+     * @example
+     *
+     * var saves = ['profile', 'settings'];
+     *
+     * var done = _.after(saves.length, function() {
+     *   console.log('Done saving!');
+     * });
+     *
+     * _.forEach(saves, function(type) {
+     *   asyncSave({ 'type': type, 'complete': done });
+     * });
+     * // => logs 'Done saving!', after all saves have completed
+     */
+    function after(n, func) {
+      if (!isFunction(func)) {
+        throw new TypeError;
+      }
+      return function() {
+        if (--n < 1) {
+          return func.apply(this, arguments);
+        }
+      };
+    }
+
+    /**
+     * Creates a function that, when called, invokes `func` with the `this`
+     * binding of `thisArg` and prepends any additional `bind` arguments to those
+     * provided to the bound function.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {Function} func The function to bind.
+     * @param {*} [thisArg] The `this` binding of `func`.
+     * @param {...*} [arg] Arguments to be partially applied.
+     * @returns {Function} Returns the new bound function.
+     * @example
+     *
+     * var func = function(greeting) {
+     *   return greeting + ' ' + this.name;
+     * };
+     *
+     * func = _.bind(func, { 'name': 'fred' }, 'hi');
+     * func();
+     * // => 'hi fred'
+     */
+    function bind(func, thisArg) {
+      return arguments.length > 2
+        ? createWrapper(func, 17, slice(arguments, 2), null, thisArg)
+        : createWrapper(func, 1, null, null, thisArg);
+    }
+
+    /**
+     * Binds methods of an object to the object itself, overwriting the existing
+     * method. Method names may be specified as individual arguments or as arrays
+     * of method names. If no method names are provided all the function properties
+     * of `object` will be bound.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {Object} object The object to bind and assign the bound methods to.
+     * @param {...string} [methodName] The object method names to
+     *  bind, specified as individual method names or arrays of method names.
+     * @returns {Object} Returns `object`.
+     * @example
+     *
+     * var view = {
+     *   'label': 'docs',
+     *   'onClick': function() { console.log('clicked ' + this.label); }
+     * };
+     *
+     * _.bindAll(view);
+     * jQuery('#docs').on('click', view.onClick);
+     * // => logs 'clicked docs', when the button is clicked
+     */
+    function bindAll(object) {
+      var funcs = arguments.length > 1 ? baseFlatten(arguments, true, false, 1) : functions(object),
+          index = -1,
+          length = funcs.length;
+
+      while (++index < length) {
+        var key = funcs[index];
+        object[key] = createWrapper(object[key], 1, null, null, object);
+      }
+      return object;
+    }
+
+    /**
+     * Creates a function that, when called, invokes the method at `object[key]`
+     * and prepends any additional `bindKey` arguments to those provided to the bound
+     * function. This method differs from `_.bind` by allowing bound functions to
+     * reference methods that will be redefined or don't yet exist.
+     * See http://michaux.ca/articles/lazy-function-definition-pattern.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {Object} object The object the method belongs to.
+     * @param {string} key The key of the method.
+     * @param {...*} [arg] Arguments to be partially applied.
+     * @returns {Function} Returns the new bound function.
+     * @example
+     *
+     * var object = {
+     *   'name': 'fred',
+     *   'greet': function(greeting) {
+     *     return greeting + ' ' + this.name;
+     *   }
+     * };
+     *
+     * var func = _.bindKey(object, 'greet', 'hi');
+     * func();
+     * // => 'hi fred'
+     *
+     * object.greet = function(greeting) {
+     *   return greeting + 'ya ' + this.name + '!';
+     * };
+     *
+     * func();
+     * // => 'hiya fred!'
+     */
+    function bindKey(object, key) {
+      return arguments.length > 2
+        ? createWrapper(key, 19, slice(arguments, 2), null, object)
+        : createWrapper(key, 3, null, null, object);
+    }
+
+    /**
+     * Creates a function that is the composition of the provided functions,
+     * where each function consumes the return value of the function that follows.
+     * For example, composing the functions `f()`, `g()`, and `h()` produces `f(g(h()))`.
+     * Each function is executed with the `this` binding of the composed function.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {...Function} [func] Functions to compose.
+     * @returns {Function} Returns the new composed function.
+     * @example
+     *
+     * var realNameMap = {
+     *   'pebbles': 'penelope'
+     * };
+     *
+     * var format = function(name) {
+     *   name = realNameMap[name.toLowerCase()] || name;
+     *   return name.charAt(0).toUpperCase() + name.slice(1).toLowerCase();
+     * };
+     *
+     * var greet = function(formatted) {
+     *   return 'Hiya ' + formatted + '!';
+     * };
+     *
+     * var welcome = _.compose(greet, format);
+     * welcome('pebbles');
+     * // => 'Hiya Penelope!'
+     */
+    function compose() {
+      var funcs = arguments,
+          length = funcs.length;
+
+      while (length--) {
+        if (!isFunction(funcs[length])) {
+          throw new TypeError;
+        }
+      }
+      return function() {
+        var args = arguments,
+            length = funcs.length;
+
+        while (length--) {
+          args = [funcs[length].apply(this, args)];
+        }
+        return args[0];
+      };
+    }
+
+    /**
+     * Creates a function which accepts one or more arguments of `func` that when
+     * invoked either executes `func` returning its result, if all `func` arguments
+     * have been provided, or returns a function that accepts one or more of the
+     * remaining `func` arguments, and so on. The arity of `func` can be specified
+     * if `func.length` is not sufficient.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {Function} func The function to curry.
+     * @param {number} [arity=func.length] The arity of `func`.
+     * @returns {Function} Returns the new curried function.
+     * @example
+     *
+     * var curried = _.curry(function(a, b, c) {
+     *   console.log(a + b + c);
+     * });
+     *
+     * curried(1)(2)(3);
+     * // => 6
+     *
+     * curried(1, 2)(3);
+     * // => 6
+     *
+     * curried(1, 2, 3);
+     * // => 6
+     */
+    function curry(func, arity) {
+      arity = typeof arity == 'number' ? arity : (+arity || func.length);
+      return createWrapper(func, 4, null, null, null, arity);
+    }
+
+    /**
+     * Creates a function that will delay the execution of `func` until after
+     * `wait` milliseconds have elapsed since the last time it was invoked.
+     * Provide an options object to indicate that `func` should be invoked on
+     * the leading and/or trailing edge of the `wait` timeout. Subsequent calls
+     * to the debounced function will return the result of the last `func` call.
+     *
+     * Note: If `leading` and `trailing` options are `true` `func` will be called
+     * on the trailing edge of the timeout only if the the debounced function is
+     * invoked more than once during the `wait` timeout.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {Function} func The function to debounce.
+     * @param {number} wait The number of milliseconds to delay.
+     * @param {Object} [options] The options object.
+     * @param {boolean} [options.leading=false] Specify execution on the leading edge of the timeout.
+     * @param {number} [options.maxWait] The maximum time `func` is allowed to be delayed before it's called.
+     * @param {boolean} [options.trailing=true] Specify execution on the trailing edge of the timeout.
+     * @returns {Function} Returns the new debounced function.
+     * @example
+     *
+     * // avoid costly calculations while the window size is in flux
+     * var lazyLayout = _.debounce(calculateLayout, 150);
+     * jQuery(window).on('resize', lazyLayout);
+     *
+     * // execute `sendMail` when the click event is fired, debouncing subsequent calls
+     * jQuery('#postbox').on('click', _.debounce(sendMail, 300, {
+     *   'leading': true,
+     *   'trailing': false
+     * });
+     *
+     * // ensure `batchLog` is executed once after 1 second of debounced calls
+     * var source = new EventSource('/stream');
+     * source.addEventListener('message', _.debounce(batchLog, 250, {
+     *   'maxWait': 1000
+     * }, false);
+     */
+    function debounce(func, wait, options) {
+      var args,
+          maxTimeoutId,
+          result,
+          stamp,
+          thisArg,
+          timeoutId,
+          trailingCall,
+          lastCalled = 0,
+          maxWait = false,
+          trailing = true;
+
+      if (!isFunction(func)) {
+        throw new TypeError;
+      }
+      wait = nativeMax(0, wait) || 0;
+      if (options === true) {
+        var leading = true;
+        trailing = false;
+      } else if (isObject(options)) {
+        leading = options.leading;
+        maxWait = 'maxWait' in options && (nativeMax(wait, options.maxWait) || 0);
+        trailing = 'trailing' in options ? options.trailing : trailing;
+      }
+      var delayed = function() {
+        var remaining = wait - (now() - stamp);
+        if (remaining <= 0) {
+          if (maxTimeoutId) {
+            clearTimeout(maxTimeoutId);
+          }
+          var isCalled = trailingCall;
+          maxTimeoutId = timeoutId = trailingCall = undefined;
+          if (isCalled) {
+            lastCalled = now();
+            result = func.apply(thisArg, args);
+            if (!timeoutId && !maxTimeoutId) {
+              args = thisArg = null;
+            }
+          }
+        } else {
+          timeoutId = setTimeout(delayed, remaining);
+        }
+      };
+
+      var maxDelayed = function() {
+        if (timeoutId) {
+          clearTimeout(timeoutId);
+        }
+        maxTimeoutId = timeoutId = trailingCall = undefined;
+        if (trailing || (maxWait !== wait)) {
+          lastCalled = now();
+          result = func.apply(thisArg, args);
+          if (!timeoutId && !maxTimeoutId) {
+            args = thisArg = null;
+          }
+        }
+      };
+
+      return function() {
+        args = arguments;
+        stamp = now();
+        thisArg = this;
+        trailingCall = trailing && (timeoutId || !leading);
+
+        if (maxWait === false) {
+          var leadingCall = leading && !timeoutId;
+        } else {
+          if (!maxTimeoutId && !leading) {
+            lastCalled = stamp;
+          }
+          var remaining = maxWait - (stamp - lastCalled),
+              isCalled = remaining <= 0;
+
+          if (isCalled) {
+            if (maxTimeoutId) {
+              maxTimeoutId = clearTimeout(maxTimeoutId);
+            }
+            lastCalled = stamp;
+            result = func.apply(thisArg, args);
+          }
+          else if (!maxTimeoutId) {
+            maxTimeoutId = setTimeout(maxDelayed, remaining);
+          }
+        }
+        if (isCalled && timeoutId) {
+          timeoutId = clearTimeout(timeoutId);
+        }
+        else if (!timeoutId && wait !== maxWait) {
+          timeoutId = setTimeout(delayed, wait);
+        }
+        if (leadingCall) {
+          isCalled = true;
+          result = func.apply(thisArg, args);
+        }
+        if (isCalled && !timeoutId && !maxTimeoutId) {
+          args = thisArg = null;
+        }
+        return result;
+      };
+    }
+
+    /**
+     * Defers executing the `func` function until the current call stack has cleared.
+     * Additional arguments will be provided to `func` when it is invoked.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {Function} func The function to defer.
+     * @param {...*} [arg] Arguments to invoke the function with.
+     * @returns {number} Returns the timer id.
+     * @example
+     *
+     * _.defer(function(text) { console.log(text); }, 'deferred');
+     * // logs 'deferred' after one or more milliseconds
+     */
+    function defer(func) {
+      if (!isFunction(func)) {
+        throw new TypeError;
+      }
+      var args = slice(arguments, 1);
+      return setTimeout(function() { func.apply(undefined, args); }, 1);
+    }
+
+    /**
+     * Executes the `func` function after `wait` milliseconds. Additional arguments
+     * will be provided to `func` when it is invoked.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {Function} func The function to delay.
+     * @param {number} wait The number of milliseconds to delay execution.
+     * @param {...*} [arg] Arguments to invoke the function with.
+     * @returns {number} Returns the timer id.
+     * @example
+     *
+     * _.delay(function(text) { console.log(text); }, 1000, 'later');
+     * // => logs 'later' after one second
+     */
+    function delay(func, wait) {
+      if (!isFunction(func)) {
+        throw new TypeError;
+      }
+      var args = slice(arguments, 2);
+      return setTimeout(function() { func.apply(undefined, args); }, wait);
+    }
+
+    /**
+     * Creates a function that memoizes the result of `func`. If `resolver` is
+     * provided it will be used to determine the cache key for storing the result
+     * based on the arguments provided to the memoized function. By default, the
+     * first argument provided to the memoized function is used as the cache key.
+     * The `func` is executed with the `this` binding of the memoized function.
+     * The result cache is exposed as the `cache` property on the memoized function.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {Function} func The function to have its output memoized.
+     * @param {Function} [resolver] A function used to resolve the cache key.
+     * @returns {Function} Returns the new memoizing function.
+     * @example
+     *
+     * var fibonacci = _.memoize(function(n) {
+     *   return n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2);
+     * });
+     *
+     * fibonacci(9)
+     * // => 34
+     *
+     * var data = {
+     *   'fred': { 'name': 'fred', 'age': 40 },
+     *   'pebbles': { 'name': 'pebbles', 'age': 1 }
+     * };
+     *
+     * // modifying the result cache
+     * var get = _.memoize(function(name) { return data[name]; }, _.identity);
+     * get('pebbles');
+     * // => { 'name': 'pebbles', 'age': 1 }
+     *
+     * get.cache.pebbles.name = 'penelope';
+     * get('pebbles');
+     * // => { 'name': 'penelope', 'age': 1 }
+     */
+    function memoize(func, resolver) {
+      if (!isFunction(func)) {
+        throw new TypeError;
+      }
+      var memoized = function() {
+        var cache = memoized.cache,
+            key = resolver ? resolver.apply(this, arguments) : keyPrefix + arguments[0];
+
+        return hasOwnProperty.call(cache, key)
+          ? cache[key]
+          : (cache[key] = func.apply(this, arguments));
+      }
+      memoized.cache = {};
+      return memoized;
+    }
+
+    /**
+     * Creates a function that is restricted to execute `func` once. Repeat calls to
+     * the function will return the value of the first call. The `func` is executed
+     * with the `this` binding of the created function.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {Function} func The function to restrict.
+     * @returns {Function} Returns the new restricted function.
+     * @example
+     *
+     * var initialize = _.once(createApplication);
+     * initialize();
+     * initialize();
+     * // `initialize` executes `createApplication` once
+     */
+    function once(func) {
+      var ran,
+          result;
+
+      if (!isFunction(func)) {
+        throw new TypeError;
+      }
+      return function() {
+        if (ran) {
+          return result;
+        }
+        ran = true;
+        result = func.apply(this, arguments);
+
+        // clear the `func` variable so the function may be garbage collected
+        func = null;
+        return result;
+      };
+    }
+
+    /**
+     * Creates a function that, when called, invokes `func` with any additional
+     * `partial` arguments prepended to those provided to the new function. This
+     * method is similar to `_.bind` except it does **not** alter the `this` binding.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {Function} func The function to partially apply arguments to.
+     * @param {...*} [arg] Arguments to be partially applied.
+     * @returns {Function} Returns the new partially applied function.
+     * @example
+     *
+     * var greet = function(greeting, name) { return greeting + ' ' + name; };
+     * var hi = _.partial(greet, 'hi');
+     * hi('fred');
+     * // => 'hi fred'
+     */
+    function partial(func) {
+      return createWrapper(func, 16, slice(arguments, 1));
+    }
+
+    /**
+     * This method is like `_.partial` except that `partial` arguments are
+     * appended to those provided to the new function.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {Function} func The function to partially apply arguments to.
+     * @param {...*} [arg] Arguments to be partially applied.
+     * @returns {Function} Returns the new partially applied function.
+     * @example
+     *
+     * var defaultsDeep = _.partialRight(_.merge, _.defaults);
+     *
+     * var options = {
+     *   'variable': 'data',
+     *   'imports': { 'jq': $ }
+     * };
+     *
+     * defaultsDeep(options, _.templateSettings);
+     *
+     * options.variable
+     * // => 'data'
+     *
+     * options.imports
+     * // => { '_': _, 'jq': $ }
+     */
+    function partialRight(func) {
+      return createWrapper(func, 32, null, slice(arguments, 1));
+    }
+
+    /**
+     * Creates a function that, when executed, will only call the `func` function
+     * at most once per every `wait` milliseconds. Provide an options object to
+     * indicate that `func` should be invoked on the leading and/or trailing edge
+     * of the `wait` timeout. Subsequent calls to the throttled function will
+     * return the result of the last `func` call.
+     *
+     * Note: If `leading` and `trailing` options are `true` `func` will be called
+     * on the trailing edge of the timeout only if the the throttled function is
+     * invoked more than once during the `wait` timeout.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {Function} func The function to throttle.
+     * @param {number} wait The number of milliseconds to throttle executions to.
+     * @param {Object} [options] The options object.
+     * @param {boolean} [options.leading=true] Specify execution on the leading edge of the timeout.
+     * @param {boolean} [options.trailing=true] Specify execution on the trailing edge of the timeout.
+     * @returns {Function} Returns the new throttled function.
+     * @example
+     *
+     * // avoid excessively updating the position while scrolling
+     * var throttled = _.throttle(updatePosition, 100);
+     * jQuery(window).on('scroll', throttled);
+     *
+     * // execute `renewToken` when the click event is fired, but not more than once every 5 minutes
+     * jQuery('.interactive').on('click', _.throttle(renewToken, 300000, {
+     *   'trailing': false
+     * }));
+     */
+    function throttle(func, wait, options) {
+      var leading = true,
+          trailing = true;
+
+      if (!isFunction(func)) {
+        throw new TypeError;
+      }
+      if (options === false) {
+        leading = false;
+      } else if (isObject(options)) {
+        leading = 'leading' in options ? options.leading : leading;
+        trailing = 'trailing' in options ? options.trailing : trailing;
+      }
+      debounceOptions.leading = leading;
+      debounceOptions.maxWait = wait;
+      debounceOptions.trailing = trailing;
+
+      return debounce(func, wait, debounceOptions);
+    }
+
+    /**
+     * Creates a function that provides `value` to the wrapper function as its
+     * first argument. Additional arguments provided to the function are appended
+     * to those provided to the wrapper function. The wrapper is executed with
+     * the `this` binding of the created function.
+     *
+     * @static
+     * @memberOf _
+     * @category Functions
+     * @param {*} value The value to wrap.
+     * @param {Function} wrapper The wrapper function.
+     * @returns {Function} Returns the new function.
+     * @example
+     *
+     * var p = _.wrap(_.escape, function(func, text) {
+     *   return '<p>' + func(text) + '</p>';
+     * });
+     *
+     * p('Fred, Wilma, & Pebbles');
+     * // => '<p>Fred, Wilma, &amp; Pebbles</p>'
+     */
+    function wrap(value, wrapper) {
+      return createWrapper(wrapper, 16, [value]);
+    }
+
+    /*--------------------------------------------------------------------------*/
+
+    /**
+     * Creates a function that returns `value`.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {*} value The value to return from the new function.
+     * @returns {Function} Returns the new function.
+     * @example
+     *
+     * var object = { 'name': 'fred' };
+     * var getter = _.constant(object);
+     * getter() === object;
+     * // => true
+     */
+    function constant(value) {
+      return function() {
+        return value;
+      };
+    }
+
+    /**
+     * Produces a callback bound to an optional `thisArg`. If `func` is a property
+     * name the created callback will return the property value for a given element.
+     * If `func` is an object the created callback will return `true` for elements
+     * that contain the equivalent object properties, otherwise it will return `false`.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {*} [func=identity] The value to convert to a callback.
+     * @param {*} [thisArg] The `this` binding of the created callback.
+     * @param {number} [argCount] The number of arguments the callback accepts.
+     * @returns {Function} Returns a callback function.
+     * @example
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36 },
+     *   { 'name': 'fred',   'age': 40 }
+     * ];
+     *
+     * // wrap to create custom callback shorthands
+     * _.createCallback = _.wrap(_.createCallback, function(func, callback, thisArg) {
+     *   var match = /^(.+?)__([gl]t)(.+)$/.exec(callback);
+     *   return !match ? func(callback, thisArg) : function(object) {
+     *     return match[2] == 'gt' ? object[match[1]] > match[3] : object[match[1]] < match[3];
+     *   };
+     * });
+     *
+     * _.filter(characters, 'age__gt38');
+     * // => [{ 'name': 'fred', 'age': 40 }]
+     */
+    function createCallback(func, thisArg, argCount) {
+      var type = typeof func;
+      if (func == null || type == 'function') {
+        return baseCreateCallback(func, thisArg, argCount);
+      }
+      // handle "_.pluck" style callback shorthands
+      if (type != 'object') {
+        return property(func);
+      }
+      var props = keys(func),
+          key = props[0],
+          a = func[key];
+
+      // handle "_.where" style callback shorthands
+      if (props.length == 1 && a === a && !isObject(a)) {
+        // fast path the common case of providing an object with a single
+        // property containing a primitive value
+        return function(object) {
+          var b = object[key];
+          return a === b && (a !== 0 || (1 / a == 1 / b));
+        };
+      }
+      return function(object) {
+        var length = props.length,
+            result = false;
+
+        while (length--) {
+          if (!(result = baseIsEqual(object[props[length]], func[props[length]], null, true))) {
+            break;
+          }
+        }
+        return result;
+      };
+    }
+
+    /**
+     * Converts the characters `&`, `<`, `>`, `"`, and `'` in `string` to their
+     * corresponding HTML entities.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {string} string The string to escape.
+     * @returns {string} Returns the escaped string.
+     * @example
+     *
+     * _.escape('Fred, Wilma, & Pebbles');
+     * // => 'Fred, Wilma, &amp; Pebbles'
+     */
+    function escape(string) {
+      return string == null ? '' : String(string).replace(reUnescapedHtml, escapeHtmlChar);
+    }
+
+    /**
+     * This method returns the first argument provided to it.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {*} value Any value.
+     * @returns {*} Returns `value`.
+     * @example
+     *
+     * var object = { 'name': 'fred' };
+     * _.identity(object) === object;
+     * // => true
+     */
+    function identity(value) {
+      return value;
+    }
+
+    /**
+     * Adds function properties of a source object to the destination object.
+     * If `object` is a function methods will be added to its prototype as well.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {Function|Object} [object=lodash] object The destination object.
+     * @param {Object} source The object of functions to add.
+     * @param {Object} [options] The options object.
+     * @param {boolean} [options.chain=true] Specify whether the functions added are chainable.
+     * @example
+     *
+     * function capitalize(string) {
+     *   return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase();
+     * }
+     *
+     * _.mixin({ 'capitalize': capitalize });
+     * _.capitalize('fred');
+     * // => 'Fred'
+     *
+     * _('fred').capitalize().value();
+     * // => 'Fred'
+     *
+     * _.mixin({ 'capitalize': capitalize }, { 'chain': false });
+     * _('fred').capitalize();
+     * // => 'Fred'
+     */
+    function mixin(object, source, options) {
+      var chain = true,
+          methodNames = source && functions(source);
+
+      if (!source || (!options && !methodNames.length)) {
+        if (options == null) {
+          options = source;
+        }
+        ctor = lodashWrapper;
+        source = object;
+        object = lodash;
+        methodNames = functions(source);
+      }
+      if (options === false) {
+        chain = false;
+      } else if (isObject(options) && 'chain' in options) {
+        chain = options.chain;
+      }
+      var ctor = object,
+          isFunc = isFunction(ctor);
+
+      forEach(methodNames, function(methodName) {
+        var func = object[methodName] = source[methodName];
+        if (isFunc) {
+          ctor.prototype[methodName] = function() {
+            var chainAll = this.__chain__,
+                value = this.__wrapped__,
+                args = [value];
+
+            push.apply(args, arguments);
+            var result = func.apply(object, args);
+            if (chain || chainAll) {
+              if (value === result && isObject(result)) {
+                return this;
+              }
+              result = new ctor(result);
+              result.__chain__ = chainAll;
+            }
+            return result;
+          };
+        }
+      });
+    }
+
+    /**
+     * Reverts the '_' variable to its previous value and returns a reference to
+     * the `lodash` function.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @returns {Function} Returns the `lodash` function.
+     * @example
+     *
+     * var lodash = _.noConflict();
+     */
+    function noConflict() {
+      context._ = oldDash;
+      return this;
+    }
+
+    /**
+     * A no-operation function.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @example
+     *
+     * var object = { 'name': 'fred' };
+     * _.noop(object) === undefined;
+     * // => true
+     */
+    function noop() {
+      // no operation performed
+    }
+
+    /**
+     * Gets the number of milliseconds that have elapsed since the Unix epoch
+     * (1 January 1970 00:00:00 UTC).
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @example
+     *
+     * var stamp = _.now();
+     * _.defer(function() { console.log(_.now() - stamp); });
+     * // => logs the number of milliseconds it took for the deferred function to be called
+     */
+    var now = isNative(now = Date.now) && now || function() {
+      return new Date().getTime();
+    };
+
+    /**
+     * Converts the given value into an integer of the specified radix.
+     * If `radix` is `undefined` or `0` a `radix` of `10` is used unless the
+     * `value` is a hexadecimal, in which case a `radix` of `16` is used.
+     *
+     * Note: This method avoids differences in native ES3 and ES5 `parseInt`
+     * implementations. See http://es5.github.io/#E.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {string} value The value to parse.
+     * @param {number} [radix] The radix used to interpret the value to parse.
+     * @returns {number} Returns the new integer value.
+     * @example
+     *
+     * _.parseInt('08');
+     * // => 8
+     */
+    var parseInt = nativeParseInt(whitespace + '08') == 8 ? nativeParseInt : function(value, radix) {
+      // Firefox < 21 and Opera < 15 follow the ES3 specified implementation of `parseInt`
+      return nativeParseInt(isString(value) ? value.replace(reLeadingSpacesAndZeros, '') : value, radix || 0);
+    };
+
+    /**
+     * Creates a "_.pluck" style function, which returns the `key` value of a
+     * given object.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {string} key The name of the property to retrieve.
+     * @returns {Function} Returns the new function.
+     * @example
+     *
+     * var characters = [
+     *   { 'name': 'fred',   'age': 40 },
+     *   { 'name': 'barney', 'age': 36 }
+     * ];
+     *
+     * var getName = _.property('name');
+     *
+     * _.map(characters, getName);
+     * // => ['barney', 'fred']
+     *
+     * _.sortBy(characters, getName);
+     * // => [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred',   'age': 40 }]
+     */
+    function property(key) {
+      return function(object) {
+        return object[key];
+      };
+    }
+
+    /**
+     * Produces a random number between `min` and `max` (inclusive). If only one
+     * argument is provided a number between `0` and the given number will be
+     * returned. If `floating` is truey or either `min` or `max` are floats a
+     * floating-point number will be returned instead of an integer.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {number} [min=0] The minimum possible value.
+     * @param {number} [max=1] The maximum possible value.
+     * @param {boolean} [floating=false] Specify returning a floating-point number.
+     * @returns {number} Returns a random number.
+     * @example
+     *
+     * _.random(0, 5);
+     * // => an integer between 0 and 5
+     *
+     * _.random(5);
+     * // => also an integer between 0 and 5
+     *
+     * _.random(5, true);
+     * // => a floating-point number between 0 and 5
+     *
+     * _.random(1.2, 5.2);
+     * // => a floating-point number between 1.2 and 5.2
+     */
+    function random(min, max, floating) {
+      var noMin = min == null,
+          noMax = max == null;
+
+      if (floating == null) {
+        if (typeof min == 'boolean' && noMax) {
+          floating = min;
+          min = 1;
+        }
+        else if (!noMax && typeof max == 'boolean') {
+          floating = max;
+          noMax = true;
+        }
+      }
+      if (noMin && noMax) {
+        max = 1;
+      }
+      min = +min || 0;
+      if (noMax) {
+        max = min;
+        min = 0;
+      } else {
+        max = +max || 0;
+      }
+      if (floating || min % 1 || max % 1) {
+        var rand = nativeRandom();
+        return nativeMin(min + (rand * (max - min + parseFloat('1e-' + ((rand +'').length - 1)))), max);
+      }
+      return baseRandom(min, max);
+    }
+
+    /**
+     * Resolves the value of property `key` on `object`. If `key` is a function
+     * it will be invoked with the `this` binding of `object` and its result returned,
+     * else the property value is returned. If `object` is falsey then `undefined`
+     * is returned.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {Object} object The object to inspect.
+     * @param {string} key The name of the property to resolve.
+     * @returns {*} Returns the resolved value.
+     * @example
+     *
+     * var object = {
+     *   'cheese': 'crumpets',
+     *   'stuff': function() {
+     *     return 'nonsense';
+     *   }
+     * };
+     *
+     * _.result(object, 'cheese');
+     * // => 'crumpets'
+     *
+     * _.result(object, 'stuff');
+     * // => 'nonsense'
+     */
+    function result(object, key) {
+      if (object) {
+        var value = object[key];
+        return isFunction(value) ? object[key]() : value;
+      }
+    }
+
+    /**
+     * A micro-templating method that handles arbitrary delimiters, preserves
+     * whitespace, and correctly escapes quotes within interpolated code.
+     *
+     * Note: In the development build, `_.template` utilizes sourceURLs for easier
+     * debugging. See http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
+     *
+     * For more information on precompiling templates see:
+     * http://lodash.com/custom-builds
+     *
+     * For more information on Chrome extension sandboxes see:
+     * http://developer.chrome.com/stable/extensions/sandboxingEval.html
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {string} text The template text.
+     * @param {Object} data The data object used to populate the text.
+     * @param {Object} [options] The options object.
+     * @param {RegExp} [options.escape] The "escape" delimiter.
+     * @param {RegExp} [options.evaluate] The "evaluate" delimiter.
+     * @param {Object} [options.imports] An object to import into the template as local variables.
+     * @param {RegExp} [options.interpolate] The "interpolate" delimiter.
+     * @param {string} [sourceURL] The sourceURL of the template's compiled source.
+     * @param {string} [variable] The data object variable name.
+     * @returns {Function|string} Returns a compiled function when no `data` object
+     *  is given, else it returns the interpolated text.
+     * @example
+     *
+     * // using the "interpolate" delimiter to create a compiled template
+     * var compiled = _.template('hello <%= name %>');
+     * compiled({ 'name': 'fred' });
+     * // => 'hello fred'
+     *
+     * // using the "escape" delimiter to escape HTML in data property values
+     * _.template('<b><%- value %></b>', { 'value': '<script>' });
+     * // => '<b>&lt;script&gt;</b>'
+     *
+     * // using the "evaluate" delimiter to generate HTML
+     * var list = '<% _.forEach(people, function(name) { %><li><%- name %></li><% }); %>';
+     * _.template(list, { 'people': ['fred', 'barney'] });
+     * // => '<li>fred</li><li>barney</li>'
+     *
+     * // using the ES6 delimiter as an alternative to the default "interpolate" delimiter
+     * _.template('hello ${ name }', { 'name': 'pebbles' });
+     * // => 'hello pebbles'
+     *
+     * // using the internal `print` function in "evaluate" delimiters
+     * _.template('<% print("hello " + name); %>!', { 'name': 'barney' });
+     * // => 'hello barney!'
+     *
+     * // using a custom template delimiters
+     * _.templateSettings = {
+     *   'interpolate': /{{([\s\S]+?)}}/g
+     * };
+     *
+     * _.template('hello {{ name }}!', { 'name': 'mustache' });
+     * // => 'hello mustache!'
+     *
+     * // using the `imports` option to import jQuery
+     * var list = '<% jq.each(people, function(name) { %><li><%- name %></li><% }); %>';
+     * _.template(list, { 'people': ['fred', 'barney'] }, { 'imports': { 'jq': jQuery } });
+     * // => '<li>fred</li><li>barney</li>'
+     *
+     * // using the `sourceURL` option to specify a custom sourceURL for the template
+     * var compiled = _.template('hello <%= name %>', null, { 'sourceURL': '/basic/greeting.jst' });
+     * compiled(data);
+     * // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector
+     *
+     * // using the `variable` option to ensure a with-statement isn't used in the compiled template
+     * var compiled = _.template('hi <%= data.name %>!', null, { 'variable': 'data' });
+     * compiled.source;
+     * // => function(data) {
+     *   var __t, __p = '', __e = _.escape;
+     *   __p += 'hi ' + ((__t = ( data.name )) == null ? '' : __t) + '!';
+     *   return __p;
+     * }
+     *
+     * // using the `source` property to inline compiled templates for meaningful
+     * // line numbers in error messages and a stack trace
+     * fs.writeFileSync(path.join(cwd, 'jst.js'), '\
+     *   var JST = {\
+     *     "main": ' + _.template(mainText).source + '\
+     *   };\
+     * ');
+     */
+    function template(text, data, options) {
+      // based on John Resig's `tmpl` implementation
+      // http://ejohn.org/blog/javascript-micro-templating/
+      // and Laura Doktorova's doT.js
+      // https://github.com/olado/doT
+      var settings = lodash.templateSettings;
+      text = String(text || '');
+
+      // avoid missing dependencies when `iteratorTemplate` is not defined
+      options = defaults({}, options, settings);
+
+      var imports = defaults({}, options.imports, settings.imports),
+          importsKeys = keys(imports),
+          importsValues = values(imports);
+
+      var isEvaluating,
+          index = 0,
+          interpolate = options.interpolate || reNoMatch,
+          source = "__p += '";
+
+      // compile the regexp to match each delimiter
+      var reDelimiters = RegExp(
+        (options.escape || reNoMatch).source + '|' +
+        interpolate.source + '|' +
+        (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
+        (options.evaluate || reNoMatch).source + '|$'
+      , 'g');
+
+      text.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
+        interpolateValue || (interpolateValue = esTemplateValue);
+
+        // escape characters that cannot be included in string literals
+        source += text.slice(index, offset).replace(reUnescapedString, escapeStringChar);
+
+        // replace delimiters with snippets
+        if (escapeValue) {
+          source += "' +\n__e(" + escapeValue + ") +\n'";
+        }
+        if (evaluateValue) {
+          isEvaluating = true;
+          source += "';\n" + evaluateValue + ";\n__p += '";
+        }
+        if (interpolateValue) {
+          source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
+        }
+        index = offset + match.length;
+
+        // the JS engine embedded in Adobe products requires returning the `match`
+        // string in order to produce the correct `offset` value
+        return match;
+      });
+
+      source += "';\n";
+
+      // if `variable` is not specified, wrap a with-statement around the generated
+      // code to add the data object to the top of the scope chain
+      var variable = options.variable,
+          hasVariable = variable;
+
+      if (!hasVariable) {
+        variable = 'obj';
+        source = 'with (' + variable + ') {\n' + source + '\n}\n';
+      }
+      // cleanup code by stripping empty strings
+      source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
+        .replace(reEmptyStringMiddle, '$1')
+        .replace(reEmptyStringTrailing, '$1;');
+
+      // frame code as the function body
+      source = 'function(' + variable + ') {\n' +
+        (hasVariable ? '' : variable + ' || (' + variable + ' = {});\n') +
+        "var __t, __p = '', __e = _.escape" +
+        (isEvaluating
+          ? ', __j = Array.prototype.join;\n' +
+            "function print() { __p += __j.call(arguments, '') }\n"
+          : ';\n'
+        ) +
+        source +
+        'return __p\n}';
+
+      // Use a sourceURL for easier debugging.
+      // http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
+      var sourceURL = '\n/*\n//# sourceURL=' + (options.sourceURL || '/lodash/template/source[' + (templateCounter++) + ']') + '\n*/';
+
+      try {
+        var result = Function(importsKeys, 'return ' + source + sourceURL).apply(undefined, importsValues);
+      } catch(e) {
+        e.source = source;
+        throw e;
+      }
+      if (data) {
+        return result(data);
+      }
+      // provide the compiled function's source by its `toString` method, in
+      // supported environments, or the `source` property as a convenience for
+      // inlining compiled templates during the build process
+      result.source = source;
+      return result;
+    }
+
+    /**
+     * Executes the callback `n` times, returning an array of the results
+     * of each callback execution. The callback is bound to `thisArg` and invoked
+     * with one argument; (index).
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {number} n The number of times to execute the callback.
+     * @param {Function} callback The function called per iteration.
+     * @param {*} [thisArg] The `this` binding of `callback`.
+     * @returns {Array} Returns an array of the results of each `callback` execution.
+     * @example
+     *
+     * var diceRolls = _.times(3, _.partial(_.random, 1, 6));
+     * // => [3, 6, 4]
+     *
+     * _.times(3, function(n) { mage.castSpell(n); });
+     * // => calls `mage.castSpell(n)` three times, passing `n` of `0`, `1`, and `2` respectively
+     *
+     * _.times(3, function(n) { this.cast(n); }, mage);
+     * // => also calls `mage.castSpell(n)` three times
+     */
+    function times(n, callback, thisArg) {
+      n = (n = +n) > -1 ? n : 0;
+      var index = -1,
+          result = Array(n);
+
+      callback = baseCreateCallback(callback, thisArg, 1);
+      while (++index < n) {
+        result[index] = callback(index);
+      }
+      return result;
+    }
+
+    /**
+     * The inverse of `_.escape` this method converts the HTML entities
+     * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to their
+     * corresponding characters.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {string} string The string to unescape.
+     * @returns {string} Returns the unescaped string.
+     * @example
+     *
+     * _.unescape('Fred, Barney &amp; Pebbles');
+     * // => 'Fred, Barney & Pebbles'
+     */
+    function unescape(string) {
+      return string == null ? '' : String(string).replace(reEscapedHtml, unescapeHtmlChar);
+    }
+
+    /**
+     * Generates a unique ID. If `prefix` is provided the ID will be appended to it.
+     *
+     * @static
+     * @memberOf _
+     * @category Utilities
+     * @param {string} [prefix] The value to prefix the ID with.
+     * @returns {string} Returns the unique ID.
+     * @example
+     *
+     * _.uniqueId('contact_');
+     * // => 'contact_104'
+     *
+     * _.uniqueId();
+     * // => '105'
+     */
+    function uniqueId(prefix) {
+      var id = ++idCounter;
+      return String(prefix == null ? '' : prefix) + id;
+    }
+
+    /*--------------------------------------------------------------------------*/
+
+    /**
+     * Creates a `lodash` object that wraps the given value with explicit
+     * method chaining enabled.
+     *
+     * @static
+     * @memberOf _
+     * @category Chaining
+     * @param {*} value The value to wrap.
+     * @returns {Object} Returns the wrapper object.
+     * @example
+     *
+     * var characters = [
+     *   { 'name': 'barney',  'age': 36 },
+     *   { 'name': 'fred',    'age': 40 },
+     *   { 'name': 'pebbles', 'age': 1 }
+     * ];
+     *
+     * var youngest = _.chain(characters)
+     *     .sortBy('age')
+     *     .map(function(chr) { return chr.name + ' is ' + chr.age; })
+     *     .first()
+     *     .value();
+     * // => 'pebbles is 1'
+     */
+    function chain(value) {
+      value = new lodashWrapper(value);
+      value.__chain__ = true;
+      return value;
+    }
+
+    /**
+     * Invokes `interceptor` with the `value` as the first argument and then
+     * returns `value`. The purpose of this method is to "tap into" a method
+     * chain in order to perform operations on intermediate results within
+     * the chain.
+     *
+     * @static
+     * @memberOf _
+     * @category Chaining
+     * @param {*} value The value to provide to `interceptor`.
+     * @param {Function} interceptor The function to invoke.
+     * @returns {*} Returns `value`.
+     * @example
+     *
+     * _([1, 2, 3, 4])
+     *  .tap(function(array) { array.pop(); })
+     *  .reverse()
+     *  .value();
+     * // => [3, 2, 1]
+     */
+    function tap(value, interceptor) {
+      interceptor(value);
+      return value;
+    }
+
+    /**
+     * Enables explicit method chaining on the wrapper object.
+     *
+     * @name chain
+     * @memberOf _
+     * @category Chaining
+     * @returns {*} Returns the wrapper object.
+     * @example
+     *
+     * var characters = [
+     *   { 'name': 'barney', 'age': 36 },
+     *   { 'name': 'fred',   'age': 40 }
+     * ];
+     *
+     * // without explicit chaining
+     * _(characters).first();
+     * // => { 'name': 'barney', 'age': 36 }
+     *
+     * // with explicit chaining
+     * _(characters).chain()
+     *   .first()
+     *   .pick('age')
+     *   .value();
+     * // => { 'age': 36 }
+     */
+    function wrapperChain() {
+      this.__chain__ = true;
+      return this;
+    }
+
+    /**
+     * Produces the `toString` result of the wrapped value.
+     *
+     * @name toString
+     * @memberOf _
+     * @category Chaining
+     * @returns {string} Returns the string result.
+     * @example
+     *
+     * _([1, 2, 3]).toString();
+     * // => '1,2,3'
+     */
+    function wrapperToString() {
+      return String(this.__wrapped__);
+    }
+
+    /**
+     * Extracts the wrapped value.
+     *
+     * @name valueOf
+     * @memberOf _
+     * @alias value
+     * @category Chaining
+     * @returns {*} Returns the wrapped value.
+     * @example
+     *
+     * _([1, 2, 3]).valueOf();
+     * // => [1, 2, 3]
+     */
+    function wrapperValueOf() {
+      return this.__wrapped__;
+    }
+
+    /*--------------------------------------------------------------------------*/
+
+    // add functions that return wrapped values when chaining
+    lodash.after = after;
+    lodash.assign = assign;
+    lodash.at = at;
+    lodash.bind = bind;
+    lodash.bindAll = bindAll;
+    lodash.bindKey = bindKey;
+    lodash.chain = chain;
+    lodash.compact = compact;
+    lodash.compose = compose;
+    lodash.constant = constant;
+    lodash.countBy = countBy;
+    lodash.create = create;
+    lodash.createCallback = createCallback;
+    lodash.curry = curry;
+    lodash.debounce = debounce;
+    lodash.defaults = defaults;
+    lodash.defer = defer;
+    lodash.delay = delay;
+    lodash.difference = difference;
+    lodash.filter = filter;
+    lodash.flatten = flatten;
+    lodash.forEach = forEach;
+    lodash.forEachRight = forEachRight;
+    lodash.forIn = forIn;
+    lodash.forInRight = forInRight;
+    lodash.forOwn = forOwn;
+    lodash.forOwnRight = forOwnRight;
+    lodash.functions = functions;
+    lodash.groupBy = groupBy;
+    lodash.indexBy = indexBy;
+    lodash.initial = initial;
+    lodash.intersection = intersection;
+    lodash.invert = invert;
+    lodash.invoke = invoke;
+    lodash.keys = keys;
+    lodash.map = map;
+    lodash.mapValues = mapValues;
+    lodash.max = max;
+    lodash.memoize = memoize;
+    lodash.merge = merge;
+    lodash.min = min;
+    lodash.omit = omit;
+    lodash.once = once;
+    lodash.pairs = pairs;
+    lodash.partial = partial;
+    lodash.partialRight = partialRight;
+    lodash.pick = pick;
+    lodash.pluck = pluck;
+    lodash.property = property;
+    lodash.pull = pull;
+    lodash.range = range;
+    lodash.reject = reject;
+    lodash.remove = remove;
+    lodash.rest = rest;
+    lodash.shuffle = shuffle;
+    lodash.sortBy = sortBy;
+    lodash.tap = tap;
+    lodash.throttle = throttle;
+    lodash.times = times;
+    lodash.toArray = toArray;
+    lodash.transform = transform;
+    lodash.union = union;
+    lodash.uniq = uniq;
+    lodash.values = values;
+    lodash.where = where;
+    lodash.without = without;
+    lodash.wrap = wrap;
+    lodash.xor = xor;
+    lodash.zip = zip;
+    lodash.zipObject = zipObject;
+
+    // add aliases
+    lodash.collect = map;
+    lodash.drop = rest;
+    lodash.each = forEach;
+    lodash.eachRight = forEachRight;
+    lodash.extend = assign;
+    lodash.methods = functions;
+    lodash.object = zipObject;
+    lodash.select = filter;
+    lodash.tail = rest;
+    lodash.unique = uniq;
+    lodash.unzip = zip;
+
+    // add functions to `lodash.prototype`
+    mixin(lodash);
+
+    /*--------------------------------------------------------------------------*/
+
+    // add functions that return unwrapped values when chaining
+    lodash.clone = clone;
+    lodash.cloneDeep = cloneDeep;
+    lodash.contains = contains;
+    lodash.escape = escape;
+    lodash.every = every;
+    lodash.find = find;
+    lodash.findIndex = findIndex;
+    lodash.findKey = findKey;
+    lodash.findLast = findLast;
+    lodash.findLastIndex = findLastIndex;
+    lodash.findLastKey = findLastKey;
+    lodash.has = has;
+    lodash.identity = identity;
+    lodash.indexOf = indexOf;
+    lodash.isArguments = isArguments;
+    lodash.isArray = isArray;
+    lodash.isBoolean = isBoolean;
+    lodash.isDate = isDate;
+    lodash.isElement = isElement;
+    lodash.isEmpty = isEmpty;
+    lodash.isEqual = isEqual;
+    lodash.isFinite = isFinite;
+    lodash.isFunction = isFunction;
+    lodash.isNaN = isNaN;
+    lodash.isNull = isNull;
+    lodash.isNumber = isNumber;
+    lodash.isObject = isObject;
+    lodash.isPlainObject = isPlainObject;
+    lodash.isRegExp = isRegExp;
+    lodash.isString = isString;
+    lodash.isUndefined = isUndefined;
+    lodash.lastIndexOf = lastIndexOf;
+    lodash.mixin = mixin;
+    lodash.noConflict = noConflict;
+    lodash.noop = noop;
+    lodash.now = now;
+    lodash.parseInt = parseInt;
+    lodash.random = random;
+    lodash.reduce = reduce;
+    lodash.reduceRight = reduceRight;
+    lodash.result = result;
+    lodash.runInContext = runInContext;
+    lodash.size = size;
+    lodash.some = some;
+    lodash.sortedIndex = sortedIndex;
+    lodash.template = template;
+    lodash.unescape = unescape;
+    lodash.uniqueId = uniqueId;
+
+    // add aliases
+    lodash.all = every;
+    lodash.any = some;
+    lodash.detect = find;
+    lodash.findWhere = find;
+    lodash.foldl = reduce;
+    lodash.foldr = reduceRight;
+    lodash.include = contains;
+    lodash.inject = reduce;
+
+    mixin(function() {
+      var source = {}
+      forOwn(lodash, function(func, methodName) {
+        if (!lodash.prototype[methodName]) {
+          source[methodName] = func;
+        }
+      });
+      return source;
+    }(), false);
+
+    /*--------------------------------------------------------------------------*/
+
+    // add functions capable of returning wrapped and unwrapped values when chaining
+    lodash.first = first;
+    lodash.last = last;
+    lodash.sample = sample;
+
+    // add aliases
+    lodash.take = first;
+    lodash.head = first;
+
+    forOwn(lodash, function(func, methodName) {
+      var callbackable = methodName !== 'sample';
+      if (!lodash.prototype[methodName]) {
+        lodash.prototype[methodName]= function(n, guard) {
+          var chainAll = this.__chain__,
+              result = func(this.__wrapped__, n, guard);
+
+          return !chainAll && (n == null || (guard && !(callbackable && typeof n == 'function')))
+            ? result
+            : new lodashWrapper(result, chainAll);
+        };
+      }
+    });
+
+    /*--------------------------------------------------------------------------*/
+
+    /**
+     * The semantic version number.
+     *
+     * @static
+     * @memberOf _
+     * @type string
+     */
+    lodash.VERSION = '2.4.1';
+
+    // add "Chaining" functions to the wrapper
+    lodash.prototype.chain = wrapperChain;
+    lodash.prototype.toString = wrapperToString;
+    lodash.prototype.value = wrapperValueOf;
+    lodash.prototype.valueOf = wrapperValueOf;
+
+    // add `Array` functions that return unwrapped values
+    forEach(['join', 'pop', 'shift'], function(methodName) {
+      var func = arrayRef[methodName];
+      lodash.prototype[methodName] = function() {
+        var chainAll = this.__chain__,
+            result = func.apply(this.__wrapped__, arguments);
+
+        return chainAll
+          ? new lodashWrapper(result, chainAll)
+          : result;
+      };
+    });
+
+    // add `Array` functions that return the existing wrapped value
+    forEach(['push', 'reverse', 'sort', 'unshift'], function(methodName) {
+      var func = arrayRef[methodName];
+      lodash.prototype[methodName] = function() {
+        func.apply(this.__wrapped__, arguments);
+        return this;
+      };
+    });
+
+    // add `Array` functions that return new wrapped values
+    forEach(['concat', 'slice', 'splice'], function(methodName) {
+      var func = arrayRef[methodName];
+      lodash.prototype[methodName] = function() {
+        return new lodashWrapper(func.apply(this.__wrapped__, arguments), this.__chain__);
+      };
+    });
+
+    return lodash;
+  }
+
+  /*--------------------------------------------------------------------------*/
+
+  // expose Lo-Dash
+  var _ = runInContext();
+
+  // some AMD build optimizers like r.js check for condition patterns like the following:
+  if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
+    // Expose Lo-Dash to the global object even when an AMD loader is present in
+    // case Lo-Dash is loaded with a RequireJS shim config.
+    // See http://requirejs.org/docs/api.html#config-shim
+    root._ = _;
+
+    // define as an anonymous module so, through path mapping, it can be
+    // referenced as the "underscore" module
+    define(function() {
+      return _;
+    });
+  }
+  // check for `exports` after `define` in case a build optimizer adds an `exports` object
+  else if (freeExports && freeModule) {
+    // in Node.js or RingoJS
+    if (moduleExports) {
+      (freeModule.exports = _)._ = _;
+    }
+    // in Narwhal or Rhino -require
+    else {
+      freeExports._ = _;
+    }
+  }
+  else {
+    // in a browser or Rhino
+    root._ = _;
+  }
+}.call(this));
+
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{}]},{},[1])(1)
+});
\ No newline at end of file
diff --git a/public/js/lib/dagre/dagre.min.js b/public/js/lib/dagre/dagre.min.js
new file mode 100644
index 0000000..cb562a2
--- /dev/null
+++ b/public/js/lib/dagre/dagre.min.js
@@ -0,0 +1,4 @@
+!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.dagre=e()}}(function(){var define,module,exports;return function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({1:[function(require,module,exports){module.exports={graphlib:require("./lib/graphlib"),layout:require("./lib/layout"),debug:require("./lib/debug"),util:{time:require("./lib/util").time,notime:require("./lib/util").notime},version:require("./lib/version")}},{"./lib/debug":6,"./lib/graphlib":7,"./lib/layout":9,"./lib/util":29,"./lib/version":30}],2:[function(require,module,exports){"use strict";var _=require("./lodash"),greedyFAS=require("./greedy-fas");module.exports={run:run,undo:undo};function run(g){var fas=g.graph().acyclicer==="greedy"?greedyFAS(g,weightFn(g)):dfsFAS(g);_.each(fas,function(e){var label=g.edge(e);g.removeEdge(e);label.forwardName=e.name;label.reversed=true;g.setEdge(e.w,e.v,label,_.uniqueId("rev"))});function weightFn(g){return function(e){return g.edge(e).weight}}}function dfsFAS(g){var fas=[],stack={},visited={};function dfs(v){if(_.has(visited,v)){return}visited[v]=true;stack[v]=true;_.each(g.outEdges(v),function(e){if(_.has(stack,e.w)){fas.push(e)}else{dfs(e.w)}});delete stack[v]}_.each(g.nodes(),dfs);return fas}function undo(g){_.each(g.edges(),function(e){var label=g.edge(e);if(label.reversed){g.removeEdge(e);var forwardName=label.forwardName;delete label.reversed;delete label.forwardName;g.setEdge(e.w,e.v,label,forwardName)}})}},{"./greedy-fas":8,"./lodash":10}],3:[function(require,module,exports){var _=require("./lodash"),util=require("./util");module.exports=addBorderSegments;function addBorderSegments(g){function dfs(v){var children=g.children(v),node=g.node(v);if(children.length){_.each(children,dfs)}if(_.has(node,"minRank")){node.borderLeft=[];node.borderRight=[];for(var rank=node.minRank,maxRank=node.maxRank+1;rank<maxRank;++rank){addBorderNode(g,"borderLeft","_bl",v,node,rank);addBorderNode(g,"borderRight","_br",v,node,rank)}}}_.each(g.children(),dfs)}function addBorderNode(g,prop,prefix,sg,sgNode,rank){var label={width:0,height:0,rank:rank},prev=sgNode[prop][rank-1],curr=util.addDummyNode(g,"border",label,prefix);sgNode[prop][rank]=curr;g.setParent(curr,sg);if(prev){g.setEdge(prev,curr,{weight:1})}}},{"./lodash":10,"./util":29}],4:[function(require,module,exports){"use strict";var _=require("./lodash");module.exports={adjust:adjust,undo:undo};function adjust(g){var rankDir=g.graph().rankdir.toLowerCase();if(rankDir==="lr"||rankDir==="rl"){swapWidthHeight(g)}}function undo(g){var rankDir=g.graph().rankdir.toLowerCase();if(rankDir==="bt"||rankDir==="rl"){reverseY(g)}if(rankDir==="lr"||rankDir==="rl"){swapXY(g);swapWidthHeight(g)}}function swapWidthHeight(g){_.each(g.nodes(),function(v){swapWidthHeightOne(g.node(v))});_.each(g.edges(),function(e){swapWidthHeightOne(g.edge(e))})}function swapWidthHeightOne(attrs){var w=attrs.width;attrs.width=attrs.height;attrs.height=w}function reverseY(g){_.each(g.nodes(),function(v){reverseYOne(g.node(v))});_.each(g.edges(),function(e){var edge=g.edge(e);_.each(edge.points,reverseYOne);if(_.has(edge,"y")){reverseYOne(edge)}})}function reverseYOne(attrs){attrs.y=-attrs.y}function swapXY(g){_.each(g.nodes(),function(v){swapXYOne(g.node(v))});_.each(g.edges(),function(e){var edge=g.edge(e);_.each(edge.points,swapXYOne);if(_.has(edge,"x")){swapXYOne(edge)}})}function swapXYOne(attrs){var x=attrs.x;attrs.x=attrs.y;attrs.y=x}},{"./lodash":10}],5:[function(require,module,exports){module.exports=List;function List(){var sentinel={};sentinel._next=sentinel._prev=sentinel;this._sentinel=sentinel}List.prototype.dequeue=function(){var sentinel=this._sentinel,entry=sentinel._prev;if(entry!==sentinel){unlink(entry);return entry}};List.prototype.enqueue=function(entry){var sentinel=this._sentinel;if(entry._prev&&entry._next){unlink(entry)}entry._next=sentinel._next;sentinel._next._prev=entry;sentinel._next=entry;entry._prev=sentinel};List.prototype.toString=function(){var strs=[],sentinel=this._sentinel,curr=sentinel._prev;while(curr!==sentinel){strs.push(JSON.stringify(curr,filterOutLinks));curr=curr._prev}return"["+strs.join(", ")+"]"};function unlink(entry){entry._prev._next=entry._next;entry._next._prev=entry._prev;delete entry._next;delete entry._prev}function filterOutLinks(k,v){if(k!=="_next"&&k!=="_prev"){return v}}},{}],6:[function(require,module,exports){var _=require("./lodash"),util=require("./util"),Graph=require("./graphlib").Graph;module.exports={debugOrdering:debugOrdering};function debugOrdering(g){var layerMatrix=util.buildLayerMatrix(g);var h=new Graph({compound:true,multigraph:true}).setGraph({});_.each(g.nodes(),function(v){h.setNode(v,{label:v});h.setParent(v,"layer"+g.node(v).rank)});_.each(g.edges(),function(e){h.setEdge(e.v,e.w,{},e.name)});_.each(layerMatrix,function(layer,i){var layerV="layer"+i;h.setNode(layerV,{rank:"same"});_.reduce(layer,function(u,v){h.setEdge(u,v,{style:"invis"});return v})});return h}},{"./graphlib":7,"./lodash":10,"./util":29}],7:[function(require,module,exports){var graphlib;if(require){try{graphlib=require("graphlib")}catch(e){}}if(!graphlib){graphlib=window.graphlib}module.exports=graphlib},{graphlib:31}],8:[function(require,module,exports){var _=require("./lodash"),Graph=require("./graphlib").Graph,List=require("./data/list");module.exports=greedyFAS;var DEFAULT_WEIGHT_FN=_.constant(1);function greedyFAS(g,weightFn){if(g.nodeCount()<=1){return[]}var state=buildState(g,weightFn||DEFAULT_WEIGHT_FN);var results=doGreedyFAS(state.graph,state.buckets,state.zeroIdx);return _.flatten(_.map(results,function(e){return g.outEdges(e.v,e.w)}),true)}function doGreedyFAS(g,buckets,zeroIdx){var results=[],sources=buckets[buckets.length-1],sinks=buckets[0];var entry;while(g.nodeCount()){while(entry=sinks.dequeue()){removeNode(g,buckets,zeroIdx,entry)}while(entry=sources.dequeue()){removeNode(g,buckets,zeroIdx,entry)}if(g.nodeCount()){for(var i=buckets.length-2;i>0;--i){entry=buckets[i].dequeue();if(entry){results=results.concat(removeNode(g,buckets,zeroIdx,entry,true));break}}}}return results}function removeNode(g,buckets,zeroIdx,entry,collectPredecessors){var results=collectPredecessors?[]:undefined;_.each(g.inEdges(entry.v),function(edge){var weight=g.edge(edge),uEntry=g.node(edge.v);if(collectPredecessors){results.push({v:edge.v,w:edge.w})}uEntry.out-=weight;assignBucket(buckets,zeroIdx,uEntry)});_.each(g.outEdges(entry.v),function(edge){var weight=g.edge(edge),w=edge.w,wEntry=g.node(w);wEntry["in"]-=weight;assignBucket(buckets,zeroIdx,wEntry)});g.removeNode(entry.v);return results}function buildState(g,weightFn){var fasGraph=new Graph,maxIn=0,maxOut=0;_.each(g.nodes(),function(v){fasGraph.setNode(v,{v:v,"in":0,out:0})});_.each(g.edges(),function(e){var prevWeight=fasGraph.edge(e.v,e.w)||0,weight=weightFn(e),edgeWeight=prevWeight+weight;fasGraph.setEdge(e.v,e.w,edgeWeight);maxOut=Math.max(maxOut,fasGraph.node(e.v).out+=weight);maxIn=Math.max(maxIn,fasGraph.node(e.w)["in"]+=weight)});var buckets=_.range(maxOut+maxIn+3).map(function(){return new List});var zeroIdx=maxIn+1;_.each(fasGraph.nodes(),function(v){assignBucket(buckets,zeroIdx,fasGraph.node(v))});return{graph:fasGraph,buckets:buckets,zeroIdx:zeroIdx}}function assignBucket(buckets,zeroIdx,entry){if(!entry.out){buckets[0].enqueue(entry)}else if(!entry["in"]){buckets[buckets.length-1].enqueue(entry)}else{buckets[entry.out-entry["in"]+zeroIdx].enqueue(entry)}}},{"./data/list":5,"./graphlib":7,"./lodash":10}],9:[function(require,module,exports){"use strict";var _=require("./lodash"),acyclic=require("./acyclic"),normalize=require("./normalize"),rank=require("./rank"),normalizeRanks=require("./util").normalizeRanks,parentDummyChains=require("./parent-dummy-chains"),removeEmptyRanks=require("./util").removeEmptyRanks,nestingGraph=require("./nesting-graph"),addBorderSegments=require("./add-border-segments"),coordinateSystem=require("./coordinate-system"),order=require("./order"),position=require("./position"),util=require("./util"),Graph=require("./graphlib").Graph;module.exports=layout;function layout(g,opts){var time=opts&&opts.debugTiming?util.time:util.notime;time("layout",function(){var layoutGraph=time("  buildLayoutGraph",function(){return buildLayoutGraph(g)});time("  runLayout",function(){runLayout(layoutGraph,time)});time("  updateInputGraph",function(){updateInputGraph(g,layoutGraph)})})}function runLayout(g,time){time("    makeSpaceForEdgeLabels",function(){makeSpaceForEdgeLabels(g)});time("    removeSelfEdges",function(){removeSelfEdges(g)});time("    acyclic",function(){acyclic.run(g)});time("    nestingGraph.run",function(){nestingGraph.run(g)});time("    rank",function(){rank(util.asNonCompoundGraph(g))});time("    injectEdgeLabelProxies",function(){injectEdgeLabelProxies(g)});time("    removeEmptyRanks",function(){removeEmptyRanks(g)});time("    nestingGraph.cleanup",function(){nestingGraph.cleanup(g)});time("    normalizeRanks",function(){normalizeRanks(g)});time("    assignRankMinMax",function(){assignRankMinMax(g)});time("    removeEdgeLabelProxies",function(){removeEdgeLabelProxies(g)});time("    normalize.run",function(){normalize.run(g)});time("    parentDummyChains",function(){parentDummyChains(g)});time("    addBorderSegments",function(){addBorderSegments(g)});time("    order",function(){order(g)});time("    insertSelfEdges",function(){insertSelfEdges(g)});time("    adjustCoordinateSystem",function(){coordinateSystem.adjust(g)});time("    position",function(){position(g)});time("    positionSelfEdges",function(){positionSelfEdges(g)});time("    removeBorderNodes",function(){removeBorderNodes(g)});time("    normalize.undo",function(){normalize.undo(g)});time("    fixupEdgeLabelCoords",function(){fixupEdgeLabelCoords(g)});time("    undoCoordinateSystem",function(){coordinateSystem.undo(g)});time("    translateGraph",function(){translateGraph(g)});time("    assignNodeIntersects",function(){assignNodeIntersects(g)});time("    reversePoints",function(){reversePointsForReversedEdges(g)});time("    acyclic.undo",function(){acyclic.undo(g)})}function updateInputGraph(inputGraph,layoutGraph){_.each(inputGraph.nodes(),function(v){var inputLabel=inputGraph.node(v),layoutLabel=layoutGraph.node(v);if(inputLabel){inputLabel.x=layoutLabel.x;inputLabel.y=layoutLabel.y;if(layoutGraph.children(v).length){inputLabel.width=layoutLabel.width;inputLabel.height=layoutLabel.height}}});_.each(inputGraph.edges(),function(e){var inputLabel=inputGraph.edge(e),layoutLabel=layoutGraph.edge(e);inputLabel.points=layoutLabel.points;if(_.has(layoutLabel,"x")){inputLabel.x=layoutLabel.x;inputLabel.y=layoutLabel.y}});inputGraph.graph().width=layoutGraph.graph().width;inputGraph.graph().height=layoutGraph.graph().height}var graphNumAttrs=["nodesep","edgesep","ranksep","marginx","marginy"],graphDefaults={ranksep:50,edgesep:20,nodesep:50,rankdir:"tb"},graphAttrs=["acyclicer","ranker","rankdir","align"],nodeNumAttrs=["width","height"],nodeDefaults={width:0,height:0},edgeNumAttrs=["minlen","weight","width","height","labeloffset"],edgeDefaults={minlen:1,weight:1,width:0,height:0,labeloffset:10,labelpos:"r"},edgeAttrs=["labelpos"];function buildLayoutGraph(inputGraph){var g=new Graph({multigraph:true,compound:true}),graph=canonicalize(inputGraph.graph());g.setGraph(_.merge({},graphDefaults,selectNumberAttrs(graph,graphNumAttrs),_.pick(graph,graphAttrs)));_.each(inputGraph.nodes(),function(v){var node=canonicalize(inputGraph.node(v));g.setNode(v,_.defaults(selectNumberAttrs(node,nodeNumAttrs),nodeDefaults));g.setParent(v,inputGraph.parent(v))});_.each(inputGraph.edges(),function(e){var edge=canonicalize(inputGraph.edge(e));g.setEdge(e,_.merge({},edgeDefaults,selectNumberAttrs(edge,edgeNumAttrs),_.pick(edge,edgeAttrs)))});return g}function makeSpaceForEdgeLabels(g){var graph=g.graph();graph.ranksep/=2;_.each(g.edges(),function(e){var edge=g.edge(e);edge.minlen*=2;if(edge.labelpos.toLowerCase()!=="c"){if(graph.rankdir==="TB"||graph.rankdir==="BT"){edge.width+=edge.labeloffset}else{edge.height+=edge.labeloffset}}})}function injectEdgeLabelProxies(g){_.each(g.edges(),function(e){var edge=g.edge(e);if(edge.width&&edge.height){var v=g.node(e.v),w=g.node(e.w),label={rank:(w.rank-v.rank)/2+v.rank,e:e};util.addDummyNode(g,"edge-proxy",label,"_ep")}})}function assignRankMinMax(g){var maxRank=0;_.each(g.nodes(),function(v){var node=g.node(v);if(node.borderTop){node.minRank=g.node(node.borderTop).rank;node.maxRank=g.node(node.borderBottom).rank;maxRank=_.max(maxRank,node.maxRank)}});g.graph().maxRank=maxRank}function removeEdgeLabelProxies(g){_.each(g.nodes(),function(v){var node=g.node(v);if(node.dummy==="edge-proxy"){g.edge(node.e).labelRank=node.rank;g.removeNode(v)}})}function translateGraph(g){var minX=Number.POSITIVE_INFINITY,maxX=0,minY=Number.POSITIVE_INFINITY,maxY=0,graphLabel=g.graph(),marginX=graphLabel.marginx||0,marginY=graphLabel.marginy||0;function getExtremes(attrs){var x=attrs.x,y=attrs.y,w=attrs.width,h=attrs.height;minX=Math.min(minX,x-w/2);maxX=Math.max(maxX,x+w/2);minY=Math.min(minY,y-h/2);maxY=Math.max(maxY,y+h/2)}_.each(g.nodes(),function(v){getExtremes(g.node(v))});_.each(g.edges(),function(e){var edge=g.edge(e);if(_.has(edge,"x")){getExtremes(edge)}});minX-=marginX;minY-=marginY;_.each(g.nodes(),function(v){var node=g.node(v);node.x-=minX;node.y-=minY});_.each(g.edges(),function(e){var edge=g.edge(e);_.each(edge.points,function(p){p.x-=minX;p.y-=minY});if(_.has(edge,"x")){edge.x-=minX}if(_.has(edge,"y")){edge.y-=minY}});graphLabel.width=maxX-minX+marginX;graphLabel.height=maxY-minY+marginY}function assignNodeIntersects(g){_.each(g.edges(),function(e){var edge=g.edge(e),nodeV=g.node(e.v),nodeW=g.node(e.w),p1,p2;if(!edge.points){edge.points=[];p1=nodeW;p2=nodeV}else{p1=edge.points[0];p2=edge.points[edge.points.length-1]}edge.points.unshift(util.intersectRect(nodeV,p1));edge.points.push(util.intersectRect(nodeW,p2))})}function fixupEdgeLabelCoords(g){_.each(g.edges(),function(e){var edge=g.edge(e);if(_.has(edge,"x")){if(edge.labelpos==="l"||edge.labelpos==="r"){edge.width-=edge.labeloffset}switch(edge.labelpos){case"l":edge.x-=edge.width/2+edge.labeloffset;break;case"r":edge.x+=edge.width/2+edge.labeloffset;break}}})}function reversePointsForReversedEdges(g){_.each(g.edges(),function(e){var edge=g.edge(e);if(edge.reversed){edge.points.reverse()}})}function removeBorderNodes(g){_.each(g.nodes(),function(v){if(g.children(v).length){var node=g.node(v),t=g.node(node.borderTop),b=g.node(node.borderBottom),l=g.node(_.last(node.borderLeft)),r=g.node(_.last(node.borderRight));node.width=Math.abs(r.x-l.x);node.height=Math.abs(b.y-t.y);node.x=l.x+node.width/2;node.y=t.y+node.height/2}});_.each(g.nodes(),function(v){if(g.node(v).dummy==="border"){g.removeNode(v)}})}function removeSelfEdges(g){_.each(g.edges(),function(e){if(e.v===e.w){var node=g.node(e.v);if(!node.selfEdges){node.selfEdges=[]}node.selfEdges.push({e:e,label:g.edge(e)});g.removeEdge(e)}})}function insertSelfEdges(g){var layers=util.buildLayerMatrix(g);_.each(layers,function(layer){var orderShift=0;_.each(layer,function(v,i){var node=g.node(v);node.order=i+orderShift;_.each(node.selfEdges,function(selfEdge){util.addDummyNode(g,"selfedge",{width:selfEdge.label.width,height:selfEdge.label.height,rank:node.rank,order:i+ ++orderShift,e:selfEdge.e,label:selfEdge.label},"_se")});delete node.selfEdges})})}function positionSelfEdges(g){_.each(g.nodes(),function(v){var node=g.node(v);if(node.dummy==="selfedge"){var selfNode=g.node(node.e.v),x=selfNode.x+selfNode.width/2,y=selfNode.y,dx=node.x-x,dy=selfNode.height/2;g.setEdge(node.e,node.label);g.removeNode(v);node.label.points=[{x:x+2*dx/3,y:y-dy},{x:x+5*dx/6,y:y-dy},{x:x+dx,y:y},{x:x+5*dx/6,y:y+dy},{x:x+2*dx/3,y:y+dy}];node.label.x=node.x;node.label.y=node.y}})}function selectNumberAttrs(obj,attrs){return _.mapValues(_.pick(obj,attrs),Number)}function canonicalize(attrs){var newAttrs={};_.each(attrs,function(v,k){newAttrs[k.toLowerCase()]=v});return newAttrs}},{"./acyclic":2,"./add-border-segments":3,"./coordinate-system":4,"./graphlib":7,"./lodash":10,"./nesting-graph":11,"./normalize":12,"./order":17,"./parent-dummy-chains":22,"./position":24,"./rank":26,"./util":29}],10:[function(require,module,exports){var lodash;if(require){try{lodash=require("lodash")}catch(e){}}if(!lodash){lodash=window._}module.exports=lodash},{lodash:51}],11:[function(require,module,exports){var _=require("./lodash"),util=require("./util");module.exports={run:run,cleanup:cleanup};function run(g){var root=util.addDummyNode(g,"root",{},"_root"),depths=treeDepths(g),height=_.max(depths)-1,nodeSep=2*height+1;g.graph().nestingRoot=root;_.each(g.edges(),function(e){g.edge(e).minlen*=nodeSep});var weight=sumWeights(g)+1;_.each(g.children(),function(child){dfs(g,root,nodeSep,weight,height,depths,child)});g.graph().nodeRankFactor=nodeSep}function dfs(g,root,nodeSep,weight,height,depths,v){var children=g.children(v);if(!children.length){if(v!==root){g.setEdge(root,v,{weight:0,minlen:nodeSep})}return}var top=util.addBorderNode(g,"_bt"),bottom=util.addBorderNode(g,"_bb"),label=g.node(v);g.setParent(top,v);label.borderTop=top;g.setParent(bottom,v);label.borderBottom=bottom;_.each(children,function(child){dfs(g,root,nodeSep,weight,height,depths,child);var childNode=g.node(child),childTop=childNode.borderTop?childNode.borderTop:child,childBottom=childNode.borderBottom?childNode.borderBottom:child,thisWeight=childNode.borderTop?weight:2*weight,minlen=childTop!==childBottom?1:height-depths[v]+1;g.setEdge(top,childTop,{weight:thisWeight,minlen:minlen,nestingEdge:true});g.setEdge(childBottom,bottom,{weight:thisWeight,minlen:minlen,nestingEdge:true})});if(!g.parent(v)){g.setEdge(root,top,{weight:0,minlen:height+depths[v]})}}function treeDepths(g){var depths={};function dfs(v,depth){var children=g.children(v);if(children&&children.length){_.each(children,function(child){dfs(child,depth+1)})}depths[v]=depth}_.each(g.children(),function(v){dfs(v,1)});return depths}function sumWeights(g){return _.reduce(g.edges(),function(acc,e){return acc+g.edge(e).weight},0)}function cleanup(g){var graphLabel=g.graph();g.removeNode(graphLabel.nestingRoot);delete graphLabel.nestingRoot;_.each(g.edges(),function(e){var edge=g.edge(e);if(edge.nestingEdge){g.removeEdge(e)}})}},{"./lodash":10,"./util":29}],12:[function(require,module,exports){"use strict";var _=require("./lodash"),util=require("./util");module.exports={run:run,undo:undo};function run(g){g.graph().dummyChains=[];_.each(g.edges(),function(edge){normalizeEdge(g,edge)})}function normalizeEdge(g,e){var v=e.v,vRank=g.node(v).rank,w=e.w,wRank=g.node(w).rank,name=e.name,edgeLabel=g.edge(e),labelRank=edgeLabel.labelRank;if(wRank===vRank+1)return;g.removeEdge(e);var dummy,attrs,i;for(i=0,++vRank;vRank<wRank;++i,++vRank){edgeLabel.points=[];attrs={width:0,height:0,edgeLabel:edgeLabel,edgeObj:e,rank:vRank};dummy=util.addDummyNode(g,"edge",attrs,"_d");if(vRank===labelRank){attrs.width=edgeLabel.width;attrs.height=edgeLabel.height;attrs.dummy="edge-label";attrs.labelpos=edgeLabel.labelpos}g.setEdge(v,dummy,{weight:edgeLabel.weight},name);if(i===0){g.graph().dummyChains.push(dummy)}v=dummy}g.setEdge(v,w,{weight:edgeLabel.weight},name)}function undo(g){_.each(g.graph().dummyChains,function(v){var node=g.node(v),origLabel=node.edgeLabel,w;g.setEdge(node.edgeObj,origLabel);while(node.dummy){w=g.successors(v)[0];g.removeNode(v);origLabel.points.push({x:node.x,y:node.y});if(node.dummy==="edge-label"){origLabel.x=node.x;origLabel.y=node.y;origLabel.width=node.width;origLabel.height=node.height}v=w;node=g.node(v)}})}},{"./lodash":10,"./util":29}],13:[function(require,module,exports){var _=require("../lodash");module.exports=addSubgraphConstraints;function addSubgraphConstraints(g,cg,vs){var prev={},rootPrev;_.each(vs,function(v){var child=g.parent(v),parent,prevChild;while(child){parent=g.parent(child);if(parent){prevChild=prev[parent];prev[parent]=child}else{prevChild=rootPrev;rootPrev=child}if(prevChild&&prevChild!==child){cg.setEdge(prevChild,child);return}child=parent}})}},{"../lodash":10}],14:[function(require,module,exports){var _=require("../lodash");module.exports=barycenter;function barycenter(g,movable){return _.map(movable,function(v){var inV=g.inEdges(v);if(!inV.length){return{v:v}}else{var result=_.reduce(inV,function(acc,e){var edge=g.edge(e),nodeU=g.node(e.v);return{sum:acc.sum+edge.weight*nodeU.order,weight:acc.weight+edge.weight}},{sum:0,weight:0});return{v:v,barycenter:result.sum/result.weight,weight:result.weight}}})}},{"../lodash":10}],15:[function(require,module,exports){var _=require("../lodash"),Graph=require("../graphlib").Graph;module.exports=buildLayerGraph;function buildLayerGraph(g,rank,relationship){var root=createRootNode(g),result=new Graph({compound:true}).setGraph({root:root}).setDefaultNodeLabel(function(v){return g.node(v)});_.each(g.nodes(),function(v){var node=g.node(v),parent=g.parent(v);if(node.rank===rank||node.minRank<=rank&&rank<=node.maxRank){result.setNode(v);result.setParent(v,parent||root);_.each(g[relationship](v),function(e){var u=e.v===v?e.w:e.v,edge=result.edge(u,v),weight=!_.isUndefined(edge)?edge.weight:0;result.setEdge(u,v,{weight:g.edge(e).weight+weight})});if(_.has(node,"minRank")){result.setNode(v,{borderLeft:node.borderLeft[rank],borderRight:node.borderRight[rank]})}}});return result}function createRootNode(g){var v;while(g.hasNode(v=_.uniqueId("_root")));return v}},{"../graphlib":7,"../lodash":10}],16:[function(require,module,exports){"use strict";var _=require("../lodash");module.exports=crossCount;function crossCount(g,layering){var cc=0;for(var i=1;i<layering.length;++i){cc+=twoLayerCrossCount(g,layering[i-1],layering[i])}return cc}function twoLayerCrossCount(g,northLayer,southLayer){var southPos=_.zipObject(southLayer,_.map(southLayer,function(v,i){return i}));var southEntries=_.flatten(_.map(northLayer,function(v){return _.chain(g.outEdges(v)).map(function(e){return{pos:southPos[e.w],weight:g.edge(e).weight}}).sortBy("pos").value()}),true);var firstIndex=1;while(firstIndex<southLayer.length)firstIndex<<=1;var treeSize=2*firstIndex-1;firstIndex-=1;var tree=_.map(new Array(treeSize),function(){return 0});var cc=0;_.each(southEntries.forEach(function(entry){var index=entry.pos+firstIndex;tree[index]+=entry.weight;var weightSum=0;while(index>0){if(index%2){weightSum+=tree[index+1]}index=index-1>>1;tree[index]+=entry.weight}cc+=entry.weight*weightSum}));return cc}},{"../lodash":10}],17:[function(require,module,exports){"use strict";var _=require("../lodash"),initOrder=require("./init-order"),crossCount=require("./cross-count"),sortSubgraph=require("./sort-subgraph"),buildLayerGraph=require("./build-layer-graph"),addSubgraphConstraints=require("./add-subgraph-constraints"),Graph=require("../graphlib").Graph,util=require("../util");module.exports=order;function order(g){var maxRank=util.maxRank(g),downLayerGraphs=buildLayerGraphs(g,_.range(1,maxRank+1),"inEdges"),upLayerGraphs=buildLayerGraphs(g,_.range(maxRank-1,-1,-1),"outEdges");var layering=initOrder(g);assignOrder(g,layering);var bestCC=Number.POSITIVE_INFINITY,best;for(var i=0,lastBest=0;lastBest<4;++i,++lastBest){sweepLayerGraphs(i%2?downLayerGraphs:upLayerGraphs,i%4>=2);layering=util.buildLayerMatrix(g);var cc=crossCount(g,layering);if(cc<bestCC){lastBest=0;best=_.cloneDeep(layering);bestCC=cc}}assignOrder(g,best)}function buildLayerGraphs(g,ranks,relationship){return _.map(ranks,function(rank){return buildLayerGraph(g,rank,relationship)})}function sweepLayerGraphs(layerGraphs,biasRight){var cg=new Graph;_.each(layerGraphs,function(lg){var root=lg.graph().root;var sorted=sortSubgraph(lg,root,cg,biasRight);_.each(sorted.vs,function(v,i){lg.node(v).order=i});addSubgraphConstraints(lg,cg,sorted.vs)})}function assignOrder(g,layering){_.each(layering,function(layer){_.each(layer,function(v,i){g.node(v).order=i})})}},{"../graphlib":7,"../lodash":10,"../util":29,"./add-subgraph-constraints":13,"./build-layer-graph":15,"./cross-count":16,"./init-order":18,"./sort-subgraph":20}],18:[function(require,module,exports){"use strict";var _=require("../lodash");module.exports=initOrder;function initOrder(g){var visited={},simpleNodes=_.filter(g.nodes(),function(v){return!g.children(v).length}),maxRank=_.max(_.map(simpleNodes,function(v){return g.node(v).rank})),layers=_.map(_.range(maxRank+1),function(){return[]});function dfs(v){if(_.has(visited,v))return;visited[v]=true;var node=g.node(v);layers[node.rank].push(v);_.each(g.successors(v),dfs)}var orderedVs=_.sortBy(simpleNodes,function(v){return g.node(v).rank});_.each(orderedVs,dfs);return layers}},{"../lodash":10}],19:[function(require,module,exports){"use strict";var _=require("../lodash");module.exports=resolveConflicts;function resolveConflicts(entries,cg){var mappedEntries={};_.each(entries,function(entry,i){var tmp=mappedEntries[entry.v]={indegree:0,"in":[],out:[],vs:[entry.v],i:i};if(!_.isUndefined(entry.barycenter)){tmp.barycenter=entry.barycenter;tmp.weight=entry.weight}});_.each(cg.edges(),function(e){var entryV=mappedEntries[e.v],entryW=mappedEntries[e.w];if(!_.isUndefined(entryV)&&!_.isUndefined(entryW)){entryW.indegree++;entryV.out.push(mappedEntries[e.w])}});var sourceSet=_.filter(mappedEntries,function(entry){return!entry.indegree});return doResolveConflicts(sourceSet)}function doResolveConflicts(sourceSet){var entries=[];function handleIn(vEntry){return function(uEntry){if(uEntry.merged){return}if(_.isUndefined(uEntry.barycenter)||_.isUndefined(vEntry.barycenter)||uEntry.barycenter>=vEntry.barycenter){mergeEntries(vEntry,uEntry)}}}function handleOut(vEntry){return function(wEntry){wEntry["in"].push(vEntry);if(--wEntry.indegree===0){sourceSet.push(wEntry)}}}while(sourceSet.length){var entry=sourceSet.pop();entries.push(entry);_.each(entry["in"].reverse(),handleIn(entry));_.each(entry.out,handleOut(entry))}return _.chain(entries).filter(function(entry){return!entry.merged}).map(function(entry){return _.pick(entry,["vs","i","barycenter","weight"])}).value()}function mergeEntries(target,source){var sum=0,weight=0;if(target.weight){sum+=target.barycenter*target.weight;weight+=target.weight}if(source.weight){sum+=source.barycenter*source.weight;weight+=source.weight}target.vs=source.vs.concat(target.vs);target.barycenter=sum/weight;target.weight=weight;target.i=Math.min(source.i,target.i);source.merged=true}},{"../lodash":10}],20:[function(require,module,exports){var _=require("../lodash"),barycenter=require("./barycenter"),resolveConflicts=require("./resolve-conflicts"),sort=require("./sort");module.exports=sortSubgraph;function sortSubgraph(g,v,cg,biasRight){var movable=g.children(v),node=g.node(v),bl=node?node.borderLeft:undefined,br=node?node.borderRight:undefined,subgraphs={};if(bl){movable=_.filter(movable,function(w){return w!==bl&&w!==br})}var barycenters=barycenter(g,movable);_.each(barycenters,function(entry){if(g.children(entry.v).length){var subgraphResult=sortSubgraph(g,entry.v,cg,biasRight);subgraphs[entry.v]=subgraphResult;if(_.has(subgraphResult,"barycenter")){mergeBarycenters(entry,subgraphResult)}}});var entries=resolveConflicts(barycenters,cg);expandSubgraphs(entries,subgraphs);var result=sort(entries,biasRight);if(bl){result.vs=_.flatten([bl,result.vs,br],true);if(g.predecessors(bl).length){var blPred=g.node(g.predecessors(bl)[0]),brPred=g.node(g.predecessors(br)[0]);if(!_.has(result,"barycenter")){result.barycenter=0;result.weight=0}result.barycenter=(result.barycenter*result.weight+blPred.order+brPred.order)/(result.weight+2);result.weight+=2}}return result}function expandSubgraphs(entries,subgraphs){_.each(entries,function(entry){entry.vs=_.flatten(entry.vs.map(function(v){if(subgraphs[v]){return subgraphs[v].vs}return v}),true)})}function mergeBarycenters(target,other){if(!_.isUndefined(target.barycenter)){target.barycenter=(target.barycenter*target.weight+other.barycenter*other.weight)/(target.weight+other.weight);target.weight+=other.weight}else{target.barycenter=other.barycenter;target.weight=other.weight}}},{"../lodash":10,"./barycenter":14,"./resolve-conflicts":19,"./sort":21}],21:[function(require,module,exports){var _=require("../lodash"),util=require("../util");module.exports=sort;function sort(entries,biasRight){var parts=util.partition(entries,function(entry){return _.has(entry,"barycenter")});var sortable=parts.lhs,unsortable=_.sortBy(parts.rhs,function(entry){return-entry.i}),vs=[],sum=0,weight=0,vsIndex=0;sortable.sort(compareWithBias(!!biasRight));vsIndex=consumeUnsortable(vs,unsortable,vsIndex);_.each(sortable,function(entry){vsIndex+=entry.vs.length;vs.push(entry.vs);sum+=entry.barycenter*entry.weight;weight+=entry.weight;vsIndex=consumeUnsortable(vs,unsortable,vsIndex)});var result={vs:_.flatten(vs,true)};if(weight){result.barycenter=sum/weight;result.weight=weight}return result}function consumeUnsortable(vs,unsortable,index){var last;while(unsortable.length&&(last=_.last(unsortable)).i<=index){unsortable.pop();vs.push(last.vs);index++}return index}function compareWithBias(bias){return function(entryV,entryW){if(entryV.barycenter<entryW.barycenter){return-1}else if(entryV.barycenter>entryW.barycenter){return 1}return!bias?entryV.i-entryW.i:entryW.i-entryV.i}}},{"../lodash":10,"../util":29}],22:[function(require,module,exports){var _=require("./lodash");module.exports=parentDummyChains;function parentDummyChains(g){var postorderNums=postorder(g);_.each(g.graph().dummyChains,function(v){var node=g.node(v),edgeObj=node.edgeObj,pathData=findPath(g,postorderNums,edgeObj.v,edgeObj.w),path=pathData.path,lca=pathData.lca,pathIdx=0,pathV=path[pathIdx],ascending=true;while(v!==edgeObj.w){node=g.node(v);if(ascending){while((pathV=path[pathIdx])!==lca&&g.node(pathV).maxRank<node.rank){pathIdx++}if(pathV===lca){ascending=false}}if(!ascending){while(pathIdx<path.length-1&&g.node(pathV=path[pathIdx+1]).minRank<=node.rank){pathIdx++}pathV=path[pathIdx]}g.setParent(v,pathV);v=g.successors(v)[0]}})}function findPath(g,postorderNums,v,w){var vPath=[],wPath=[],low=Math.min(postorderNums[v].low,postorderNums[w].low),lim=Math.max(postorderNums[v].lim,postorderNums[w].lim),parent,lca;parent=v;do{parent=g.parent(parent);vPath.push(parent)}while(parent&&(postorderNums[parent].low>low||lim>postorderNums[parent].lim));lca=parent;parent=w;while((parent=g.parent(parent))!==lca){wPath.push(parent)}return{path:vPath.concat(wPath.reverse()),lca:lca}}function postorder(g){var result={},lim=0;function dfs(v){var low=lim;_.each(g.children(v),dfs);result[v]={low:low,lim:lim++}}_.each(g.children(),dfs);return result}},{"./lodash":10}],23:[function(require,module,exports){"use strict";var _=require("../lodash"),Graph=require("../graphlib").Graph,util=require("../util");module.exports={positionX:positionX,findType1Conflicts:findType1Conflicts,findType2Conflicts:findType2Conflicts,addConflict:addConflict,hasConflict:hasConflict,verticalAlignment:verticalAlignment,horizontalCompaction:horizontalCompaction,alignCoordinates:alignCoordinates,findSmallestWidthAlignment:findSmallestWidthAlignment,balance:balance};function findType1Conflicts(g,layering){var conflicts={};function visitLayer(prevLayer,layer){var k0=0,scanPos=0,prevLayerLength=prevLayer.length,lastNode=_.last(layer);_.each(layer,function(v,i){var w=findOtherInnerSegmentNode(g,v),k1=w?g.node(w).order:prevLayerLength;if(w||v===lastNode){_.each(layer.slice(scanPos,i+1),function(scanNode){_.each(g.predecessors(scanNode),function(u){var uLabel=g.node(u),uPos=uLabel.order;
+if((uPos<k0||k1<uPos)&&!(uLabel.dummy&&g.node(scanNode).dummy)){addConflict(conflicts,u,scanNode)}})});scanPos=i+1;k0=k1}});return layer}_.reduce(layering,visitLayer);return conflicts}function findType2Conflicts(g,layering){var conflicts={};function scan(south,southPos,southEnd,prevNorthBorder,nextNorthBorder){var v;_.each(_.range(southPos,southEnd),function(i){v=south[i];if(g.node(v).dummy){_.each(g.predecessors(v),function(u){var uNode=g.node(u);if(uNode.dummy&&(uNode.order<prevNorthBorder||uNode.order>nextNorthBorder)){addConflict(conflicts,u,v)}})}})}function visitLayer(north,south){var prevNorthPos=-1,nextNorthPos,southPos=0;_.each(south,function(v,southLookahead){if(g.node(v).dummy==="border"){var predecessors=g.predecessors(v);if(predecessors.length){nextNorthPos=g.node(predecessors[0]).order;scan(south,southPos,southLookahead,prevNorthPos,nextNorthPos);southPos=southLookahead;prevNorthPos=nextNorthPos}}scan(south,southPos,south.length,nextNorthPos,north.length)});return south}_.reduce(layering,visitLayer);return conflicts}function findOtherInnerSegmentNode(g,v){if(g.node(v).dummy){return _.find(g.predecessors(v),function(u){return g.node(u).dummy})}}function addConflict(conflicts,v,w){if(v>w){var tmp=v;v=w;w=tmp}var conflictsV=conflicts[v];if(!conflictsV){conflicts[v]=conflictsV={}}conflictsV[w]=true}function hasConflict(conflicts,v,w){if(v>w){var tmp=v;v=w;w=tmp}return _.has(conflicts[v],w)}function verticalAlignment(g,layering,conflicts,neighborFn){var root={},align={},pos={};_.each(layering,function(layer){_.each(layer,function(v,order){root[v]=v;align[v]=v;pos[v]=order})});_.each(layering,function(layer){var prevIdx=-1;_.each(layer,function(v){var ws=neighborFn(v);if(ws.length){ws=_.sortBy(ws,function(w){return pos[w]});var mp=(ws.length-1)/2;for(var i=Math.floor(mp),il=Math.ceil(mp);i<=il;++i){var w=ws[i];if(align[v]===v&&prevIdx<pos[w]&&!hasConflict(conflicts,v,w)){align[w]=v;align[v]=root[v]=root[w];prevIdx=pos[w]}}}})});return{root:root,align:align}}function horizontalCompaction(g,layering,root,align,reverseSep){var xs={},blockG=buildBlockGraph(g,layering,root,reverseSep);var visited={};function pass1(v){if(!_.has(visited,v)){visited[v]=true;xs[v]=_.reduce(blockG.inEdges(v),function(max,e){pass1(e.v);return Math.max(max,xs[e.v]+blockG.edge(e))},0)}}_.each(blockG.nodes(),pass1);function pass2(v){if(visited[v]!==2){visited[v]++;var min=_.reduce(blockG.outEdges(v),function(min,e){pass2(e.w);return Math.min(min,xs[e.w]-blockG.edge(e))},Number.POSITIVE_INFINITY);if(min!==Number.POSITIVE_INFINITY){xs[v]=Math.max(xs[v],min)}}}_.each(blockG.nodes(),pass2);_.each(align,function(v){xs[v]=xs[root[v]]});return xs}function buildBlockGraph(g,layering,root,reverseSep){var blockGraph=new Graph,graphLabel=g.graph(),sepFn=sep(graphLabel.nodesep,graphLabel.edgesep,reverseSep);_.each(layering,function(layer){var u;_.each(layer,function(v){var vRoot=root[v];blockGraph.setNode(vRoot);if(u){var uRoot=root[u],prevMax=blockGraph.edge(uRoot,vRoot);blockGraph.setEdge(uRoot,vRoot,Math.max(sepFn(g,v,u),prevMax||0))}u=v})});return blockGraph}function findSmallestWidthAlignment(g,xss){return _.min(xss,function(xs){var min=_.min(xs,function(x,v){return x-width(g,v)/2}),max=_.max(xs,function(x,v){return x+width(g,v)/2});return max-min})}function alignCoordinates(xss,alignTo){var alignToMin=_.min(alignTo),alignToMax=_.max(alignTo);_.each(["u","d"],function(vert){_.each(["l","r"],function(horiz){var alignment=vert+horiz,xs=xss[alignment],delta;if(xs===alignTo)return;delta=horiz==="l"?alignToMin-_.min(xs):alignToMax-_.max(xs);if(delta){xss[alignment]=_.mapValues(xs,function(x){return x+delta})}})})}function balance(xss,align){return _.mapValues(xss.ul,function(ignore,v){if(align){return xss[align.toLowerCase()][v]}else{var xs=_.sortBy(_.pluck(xss,v));return(xs[1]+xs[2])/2}})}function positionX(g){var layering=util.buildLayerMatrix(g),conflicts=_.merge(findType1Conflicts(g,layering),findType2Conflicts(g,layering));var xss={},adjustedLayering;_.each(["u","d"],function(vert){adjustedLayering=vert==="u"?layering:_.values(layering).reverse();_.each(["l","r"],function(horiz){if(horiz==="r"){adjustedLayering=_.map(adjustedLayering,function(inner){return _.values(inner).reverse()})}var neighborFn=_.bind(vert==="u"?g.predecessors:g.successors,g);var align=verticalAlignment(g,adjustedLayering,conflicts,neighborFn);var xs=horizontalCompaction(g,adjustedLayering,align.root,align.align,horiz==="r");if(horiz==="r"){xs=_.mapValues(xs,function(x){return-x})}xss[vert+horiz]=xs})});var smallestWidth=findSmallestWidthAlignment(g,xss);alignCoordinates(xss,smallestWidth);return balance(xss,g.graph().align)}function sep(nodeSep,edgeSep,reverseSep){return function(g,v,w){var vLabel=g.node(v),wLabel=g.node(w),sum=0,delta;sum+=vLabel.width/2;if(_.has(vLabel,"labelpos")){switch(vLabel.labelpos.toLowerCase()){case"l":delta=-vLabel.width/2;break;case"r":delta=vLabel.width/2;break}}if(delta){sum+=reverseSep?delta:-delta}delta=0;sum+=(vLabel.dummy?edgeSep:nodeSep)/2;sum+=(wLabel.dummy?edgeSep:nodeSep)/2;sum+=wLabel.width/2;if(_.has(wLabel,"labelpos")){switch(wLabel.labelpos.toLowerCase()){case"l":delta=wLabel.width/2;break;case"r":delta=-wLabel.width/2;break}}if(delta){sum+=reverseSep?delta:-delta}delta=0;return sum}}function width(g,v){return g.node(v).width}},{"../graphlib":7,"../lodash":10,"../util":29}],24:[function(require,module,exports){"use strict";var _=require("../lodash"),util=require("../util"),positionX=require("./bk").positionX;module.exports=position;function position(g){g=util.asNonCompoundGraph(g);positionY(g);_.each(positionX(g),function(x,v){g.node(v).x=x})}function positionY(g){var layering=util.buildLayerMatrix(g),rankSep=g.graph().ranksep,prevY=0;_.each(layering,function(layer){var maxHeight=_.max(_.map(layer,function(v){return g.node(v).height}));_.each(layer,function(v){g.node(v).y=prevY+maxHeight/2});prevY+=maxHeight+rankSep})}},{"../lodash":10,"../util":29,"./bk":23}],25:[function(require,module,exports){"use strict";var _=require("../lodash"),Graph=require("../graphlib").Graph,slack=require("./util").slack;module.exports=feasibleTree;function feasibleTree(g){var t=new Graph({directed:false});var start=g.nodes()[0],size=g.nodeCount();t.setNode(start,{});var edge,delta;while(tightTree(t,g)<size){edge=findMinSlackEdge(t,g);delta=t.hasNode(edge.v)?slack(g,edge):-slack(g,edge);shiftRanks(t,g,delta)}return t}function tightTree(t,g){function dfs(v){_.each(g.nodeEdges(v),function(e){var edgeV=e.v,w=v===edgeV?e.w:edgeV;if(!t.hasNode(w)&&!slack(g,e)){t.setNode(w,{});t.setEdge(v,w,{});dfs(w)}})}_.each(t.nodes(),dfs);return t.nodeCount()}function findMinSlackEdge(t,g){return _.min(g.edges(),function(e){if(t.hasNode(e.v)!==t.hasNode(e.w)){return slack(g,e)}})}function shiftRanks(t,g,delta){_.each(t.nodes(),function(v){g.node(v).rank+=delta})}},{"../graphlib":7,"../lodash":10,"./util":28}],26:[function(require,module,exports){"use strict";var rankUtil=require("./util"),longestPath=rankUtil.longestPath,feasibleTree=require("./feasible-tree"),networkSimplex=require("./network-simplex");module.exports=rank;function rank(g){switch(g.graph().ranker){case"network-simplex":networkSimplexRanker(g);break;case"tight-tree":tightTreeRanker(g);break;case"longest-path":longestPathRanker(g);break;default:networkSimplexRanker(g)}}var longestPathRanker=longestPath;function tightTreeRanker(g){longestPath(g);feasibleTree(g)}function networkSimplexRanker(g){networkSimplex(g)}},{"./feasible-tree":25,"./network-simplex":27,"./util":28}],27:[function(require,module,exports){"use strict";var _=require("../lodash"),feasibleTree=require("./feasible-tree"),slack=require("./util").slack,initRank=require("./util").longestPath,preorder=require("../graphlib").alg.preorder,postorder=require("../graphlib").alg.postorder,simplify=require("../util").simplify;module.exports=networkSimplex;networkSimplex.initLowLimValues=initLowLimValues;networkSimplex.initCutValues=initCutValues;networkSimplex.calcCutValue=calcCutValue;networkSimplex.leaveEdge=leaveEdge;networkSimplex.enterEdge=enterEdge;networkSimplex.exchangeEdges=exchangeEdges;function networkSimplex(g){g=simplify(g);initRank(g);var t=feasibleTree(g);initLowLimValues(t);initCutValues(t,g);var e,f;while(e=leaveEdge(t)){f=enterEdge(t,g,e);exchangeEdges(t,g,e,f)}}function initCutValues(t,g){var vs=postorder(t,t.nodes());vs=vs.slice(0,vs.length-1);_.each(vs,function(v){assignCutValue(t,g,v)})}function assignCutValue(t,g,child){var childLab=t.node(child),parent=childLab.parent;t.edge(child,parent).cutvalue=calcCutValue(t,g,child)}function calcCutValue(t,g,child){var childLab=t.node(child),parent=childLab.parent,childIsTail=true,graphEdge=g.edge(child,parent),cutValue=0;if(!graphEdge){childIsTail=false;graphEdge=g.edge(parent,child)}cutValue=graphEdge.weight;_.each(g.nodeEdges(child),function(e){var isOutEdge=e.v===child,other=isOutEdge?e.w:e.v;if(other!==parent){var pointsToHead=isOutEdge===childIsTail,otherWeight=g.edge(e).weight;cutValue+=pointsToHead?otherWeight:-otherWeight;if(isTreeEdge(t,child,other)){var otherCutValue=t.edge(child,other).cutvalue;cutValue+=pointsToHead?-otherCutValue:otherCutValue}}});return cutValue}function initLowLimValues(tree,root){if(arguments.length<2){root=tree.nodes()[0]}dfsAssignLowLim(tree,{},1,root)}function dfsAssignLowLim(tree,visited,nextLim,v,parent){var low=nextLim,label=tree.node(v);visited[v]=true;_.each(tree.neighbors(v),function(w){if(!_.has(visited,w)){nextLim=dfsAssignLowLim(tree,visited,nextLim,w,v)}});label.low=low;label.lim=nextLim++;if(parent){label.parent=parent}else{delete label.parent}return nextLim}function leaveEdge(tree){return _.find(tree.edges(),function(e){return tree.edge(e).cutvalue<0})}function enterEdge(t,g,edge){var v=edge.v,w=edge.w;if(!g.hasEdge(v,w)){v=edge.w;w=edge.v}var vLabel=t.node(v),wLabel=t.node(w),tailLabel=vLabel,flip=false;if(vLabel.lim>wLabel.lim){tailLabel=wLabel;flip=true}var candidates=_.filter(g.edges(),function(edge){return flip===isDescendant(t,t.node(edge.v),tailLabel)&&flip!==isDescendant(t,t.node(edge.w),tailLabel)});return _.min(candidates,function(edge){return slack(g,edge)})}function exchangeEdges(t,g,e,f){var v=e.v,w=e.w;t.removeEdge(v,w);t.setEdge(f.v,f.w,{});initLowLimValues(t);initCutValues(t,g);updateRanks(t,g)}function updateRanks(t,g){var root=_.find(t.nodes(),function(v){return!g.node(v).parent}),vs=preorder(t,root);vs=vs.slice(1);_.each(vs,function(v){var parent=t.node(v).parent,edge=g.edge(v,parent),flipped=false;if(!edge){edge=g.edge(parent,v);flipped=true}g.node(v).rank=g.node(parent).rank+(flipped?edge.minlen:-edge.minlen)})}function isTreeEdge(tree,u,v){return tree.hasEdge(u,v)}function isDescendant(tree,vLabel,rootLabel){return rootLabel.low<=vLabel.lim&&vLabel.lim<=rootLabel.lim}},{"../graphlib":7,"../lodash":10,"../util":29,"./feasible-tree":25,"./util":28}],28:[function(require,module,exports){"use strict";var _=require("../lodash");module.exports={longestPath:longestPath,slack:slack};function longestPath(g){var visited={};function dfs(v){var label=g.node(v);if(_.has(visited,v)){return label.rank}visited[v]=true;var rank=_.min(_.map(g.outEdges(v),function(e){return dfs(e.w)-g.edge(e).minlen}));if(rank===Number.POSITIVE_INFINITY){rank=0}return label.rank=rank}_.each(g.sources(),dfs)}function slack(g,e){return g.node(e.w).rank-g.node(e.v).rank-g.edge(e).minlen}},{"../lodash":10}],29:[function(require,module,exports){"use strict";var _=require("./lodash"),Graph=require("./graphlib").Graph;module.exports={addDummyNode:addDummyNode,simplify:simplify,asNonCompoundGraph:asNonCompoundGraph,successorWeights:successorWeights,predecessorWeights:predecessorWeights,intersectRect:intersectRect,buildLayerMatrix:buildLayerMatrix,normalizeRanks:normalizeRanks,removeEmptyRanks:removeEmptyRanks,addBorderNode:addBorderNode,maxRank:maxRank,partition:partition,time:time,notime:notime};function addDummyNode(g,type,attrs,name){var v;do{v=_.uniqueId(name)}while(g.hasNode(v));attrs.dummy=type;g.setNode(v,attrs);return v}function simplify(g){var simplified=(new Graph).setGraph(g.graph());_.each(g.nodes(),function(v){simplified.setNode(v,g.node(v))});_.each(g.edges(),function(e){var simpleLabel=simplified.edge(e.v,e.w)||{weight:0,minlen:1},label=g.edge(e);simplified.setEdge(e.v,e.w,{weight:simpleLabel.weight+label.weight,minlen:Math.max(simpleLabel.minlen,label.minlen)})});return simplified}function asNonCompoundGraph(g){var simplified=new Graph({multigraph:g.isMultigraph()}).setGraph(g.graph());_.each(g.nodes(),function(v){if(!g.children(v).length){simplified.setNode(v,g.node(v))}});_.each(g.edges(),function(e){simplified.setEdge(e,g.edge(e))});return simplified}function successorWeights(g){var weightMap=_.map(g.nodes(),function(v){var sucs={};_.each(g.outEdges(v),function(e){sucs[e.w]=(sucs[e.w]||0)+g.edge(e).weight});return sucs});return _.zipObject(g.nodes(),weightMap)}function predecessorWeights(g){var weightMap=_.map(g.nodes(),function(v){var preds={};_.each(g.inEdges(v),function(e){preds[e.v]=(preds[e.v]||0)+g.edge(e).weight});return preds});return _.zipObject(g.nodes(),weightMap)}function intersectRect(rect,point){var x=rect.x;var y=rect.y;var dx=point.x-x;var dy=point.y-y;var w=rect.width/2;var h=rect.height/2;if(!dx&&!dy){throw new Error("Not possible to find intersection inside of the rectangle")}var sx,sy;if(Math.abs(dy)*w>Math.abs(dx)*h){if(dy<0){h=-h}sx=h*dx/dy;sy=h}else{if(dx<0){w=-w}sx=w;sy=w*dy/dx}return{x:x+sx,y:y+sy}}function buildLayerMatrix(g){var layering=_.map(_.range(maxRank(g)+1),function(){return[]});_.each(g.nodes(),function(v){var node=g.node(v),rank=node.rank;if(!_.isUndefined(rank)){layering[rank][node.order]=v}});return layering}function normalizeRanks(g){var min=_.min(_.map(g.nodes(),function(v){return g.node(v).rank}));_.each(g.nodes(),function(v){var node=g.node(v);if(_.has(node,"rank")){node.rank-=min}})}function removeEmptyRanks(g){var offset=_.min(_.map(g.nodes(),function(v){return g.node(v).rank}));var layers=[];_.each(g.nodes(),function(v){var rank=g.node(v).rank-offset;if(!_.has(layers,rank)){layers[rank]=[]}layers[rank].push(v)});var delta=0,nodeRankFactor=g.graph().nodeRankFactor;_.each(layers,function(vs,i){if(_.isUndefined(vs)&&i%nodeRankFactor!==0){--delta}else if(delta){_.each(vs,function(v){g.node(v).rank+=delta})}})}function addBorderNode(g,prefix,rank,order){var node={width:0,height:0};if(arguments.length>=4){node.rank=rank;node.order=order}return addDummyNode(g,"border",node,prefix)}function maxRank(g){return _.max(_.map(g.nodes(),function(v){var rank=g.node(v).rank;if(!_.isUndefined(rank)){return rank}}))}function partition(collection,fn){var result={lhs:[],rhs:[]};_.each(collection,function(value){if(fn(value)){result.lhs.push(value)}else{result.rhs.push(value)}});return result}function time(name,fn){var start=_.now();try{return fn()}finally{console.log(name+" time: "+(_.now()-start)+"ms")}}function notime(name,fn){return fn()}},{"./graphlib":7,"./lodash":10}],30:[function(require,module,exports){module.exports="0.7.1"},{}],31:[function(require,module,exports){var lib=require("./lib");module.exports={Graph:lib.Graph,json:require("./lib/json"),alg:require("./lib/alg"),version:lib.version}},{"./lib":47,"./lib/alg":38,"./lib/json":48}],32:[function(require,module,exports){var _=require("../lodash");module.exports=components;function components(g){var visited={},cmpts=[],cmpt;function dfs(v){if(_.has(visited,v))return;visited[v]=true;cmpt.push(v);_.each(g.successors(v),dfs);_.each(g.predecessors(v),dfs)}_.each(g.nodes(),function(v){cmpt=[];dfs(v);if(cmpt.length){cmpts.push(cmpt)}});return cmpts}},{"../lodash":49}],33:[function(require,module,exports){var _=require("../lodash");module.exports=dfs;function dfs(g,vs,order){if(!_.isArray(vs)){vs=[vs]}var acc=[],visited={};_.each(vs,function(v){if(!g.hasNode(v)){throw new Error("Graph does not have node: "+v)}doDfs(g,v,order==="post",visited,acc)});return acc}function doDfs(g,v,postorder,visited,acc){if(!_.has(visited,v)){visited[v]=true;if(!postorder){acc.push(v)}_.each(g.neighbors(v),function(w){doDfs(g,w,postorder,visited,acc)});if(postorder){acc.push(v)}}}},{"../lodash":49}],34:[function(require,module,exports){var dijkstra=require("./dijkstra"),_=require("../lodash");module.exports=dijkstraAll;function dijkstraAll(g,weightFunc,edgeFunc){return _.transform(g.nodes(),function(acc,v){acc[v]=dijkstra(g,v,weightFunc,edgeFunc)},{})}},{"../lodash":49,"./dijkstra":35}],35:[function(require,module,exports){var _=require("../lodash"),PriorityQueue=require("../data/priority-queue");module.exports=dijkstra;var DEFAULT_WEIGHT_FUNC=_.constant(1);function dijkstra(g,source,weightFn,edgeFn){return runDijkstra(g,String(source),weightFn||DEFAULT_WEIGHT_FUNC,edgeFn||function(v){return g.outEdges(v)})}function runDijkstra(g,source,weightFn,edgeFn){var results={},pq=new PriorityQueue,v,vEntry;var updateNeighbors=function(edge){var w=edge.v!==v?edge.v:edge.w,wEntry=results[w],weight=weightFn(edge),distance=vEntry.distance+weight;if(weight<0){throw new Error("dijkstra does not allow negative edge weights. "+"Bad edge: "+edge+" Weight: "+weight)}if(distance<wEntry.distance){wEntry.distance=distance;wEntry.predecessor=v;pq.decrease(w,distance)}};g.nodes().forEach(function(v){var distance=v===source?0:Number.POSITIVE_INFINITY;results[v]={distance:distance};pq.add(v,distance)});while(pq.size()>0){v=pq.removeMin();vEntry=results[v];if(vEntry.distance===Number.POSITIVE_INFINITY){break}edgeFn(v).forEach(updateNeighbors)}return results}},{"../data/priority-queue":45,"../lodash":49}],36:[function(require,module,exports){var _=require("../lodash"),tarjan=require("./tarjan");module.exports=findCycles;function findCycles(g){return _.filter(tarjan(g),function(cmpt){return cmpt.length>1})}},{"../lodash":49,"./tarjan":43}],37:[function(require,module,exports){var _=require("../lodash");module.exports=floydWarshall;var DEFAULT_WEIGHT_FUNC=_.constant(1);function floydWarshall(g,weightFn,edgeFn){return runFloydWarshall(g,weightFn||DEFAULT_WEIGHT_FUNC,edgeFn||function(v){return g.outEdges(v)})}function runFloydWarshall(g,weightFn,edgeFn){var results={},nodes=g.nodes();nodes.forEach(function(v){results[v]={};results[v][v]={distance:0};nodes.forEach(function(w){if(v!==w){results[v][w]={distance:Number.POSITIVE_INFINITY}}});edgeFn(v).forEach(function(edge){var w=edge.v===v?edge.w:edge.v,d=weightFn(edge);results[v][w]={distance:d,predecessor:v}})});nodes.forEach(function(k){var rowK=results[k];nodes.forEach(function(i){var rowI=results[i];nodes.forEach(function(j){var ik=rowI[k];var kj=rowK[j];var ij=rowI[j];var altDistance=ik.distance+kj.distance;if(altDistance<ij.distance){ij.distance=altDistance;ij.predecessor=kj.predecessor}})})});return results}},{"../lodash":49}],38:[function(require,module,exports){module.exports={components:require("./components"),dijkstra:require("./dijkstra"),dijkstraAll:require("./dijkstra-all"),findCycles:require("./find-cycles"),floydWarshall:require("./floyd-warshall"),isAcyclic:require("./is-acyclic"),postorder:require("./postorder"),preorder:require("./preorder"),prim:require("./prim"),tarjan:require("./tarjan"),topsort:require("./topsort")}},{"./components":32,"./dijkstra":35,"./dijkstra-all":34,"./find-cycles":36,"./floyd-warshall":37,"./is-acyclic":39,"./postorder":40,"./preorder":41,"./prim":42,"./tarjan":43,"./topsort":44}],39:[function(require,module,exports){var topsort=require("./topsort");module.exports=isAcyclic;function isAcyclic(g){try{topsort(g)}catch(e){if(e instanceof topsort.CycleException){return false}throw e}return true}},{"./topsort":44}],40:[function(require,module,exports){var dfs=require("./dfs");module.exports=postorder;function postorder(g,vs){return dfs(g,vs,"post")}},{"./dfs":33}],41:[function(require,module,exports){var dfs=require("./dfs");module.exports=preorder;function preorder(g,vs){return dfs(g,vs,"pre")}},{"./dfs":33}],42:[function(require,module,exports){var _=require("../lodash"),Graph=require("../graph"),PriorityQueue=require("../data/priority-queue");module.exports=prim;function prim(g,weightFunc){var result=new Graph,parents={},pq=new PriorityQueue,v;function updateNeighbors(edge){var w=edge.v===v?edge.w:edge.v,pri=pq.priority(w);if(pri!==undefined){var edgeWeight=weightFunc(edge);if(edgeWeight<pri){parents[w]=v;pq.decrease(w,edgeWeight)}}}if(g.nodeCount()===0){return result}_.each(g.nodes(),function(v){pq.add(v,Number.POSITIVE_INFINITY);result.setNode(v)});pq.decrease(g.nodes()[0],0);var init=false;while(pq.size()>0){v=pq.removeMin();if(_.has(parents,v)){result.setEdge(v,parents[v])}else if(init){throw new Error("Input graph is not connected: "+g)}else{init=true}g.nodeEdges(v).forEach(updateNeighbors)}return result}},{"../data/priority-queue":45,"../graph":46,"../lodash":49}],43:[function(require,module,exports){var _=require("../lodash");module.exports=tarjan;function tarjan(g){var index=0,stack=[],visited={},results=[];function dfs(v){var entry=visited[v]={onStack:true,lowlink:index,index:index++};stack.push(v);g.successors(v).forEach(function(w){if(!_.has(visited,w)){dfs(w);entry.lowlink=Math.min(entry.lowlink,visited[w].lowlink)}else if(visited[w].onStack){entry.lowlink=Math.min(entry.lowlink,visited[w].index)}});if(entry.lowlink===entry.index){var cmpt=[],w;do{w=stack.pop();visited[w].onStack=false;cmpt.push(w)}while(v!==w);results.push(cmpt)}}g.nodes().forEach(function(v){if(!_.has(visited,v)){dfs(v)}});return results}},{"../lodash":49}],44:[function(require,module,exports){var _=require("../lodash");module.exports=topsort;topsort.CycleException=CycleException;function topsort(g){var visited={},stack={},results=[];function visit(node){if(_.has(stack,node)){throw new 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