diff --git a/public/js/dagre-d3.min.js b/public/js/dagre-d3.min.js
new file mode 100644
index 0000000..606fdce
--- /dev/null
+++ b/public/js/dagre-d3.min.js
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d=b[c.rank]||(b[c.rank]=[]);d[c.order]=a}),b},c.filterNonSubgraphs=function(a){return function(b){return a.children(b).length===0}},d.enabled=!1,c.time=d,e.level=0,c.log=e},{}],27:[function(a,b,c){b.exports="0.4.5"},{}],28:[function(a,b,c){c.Graph=a("./lib/Graph"),c.Digraph=a("./lib/Digraph"),c.CGraph=a("./lib/CGraph"),c.CDigraph=a("./lib/CDigraph"),a("./lib/graph-converters"),c.alg={isAcyclic:a("./lib/alg/isAcyclic"),components:a("./lib/alg/components"),dijkstra:a("./lib/alg/dijkstra"),dijkstraAll:a("./lib/alg/dijkstraAll"),findCycles:a("./lib/alg/findCycles"),floydWarshall:a("./lib/alg/floydWarshall"),postorder:a("./lib/alg/postorder"),preorder:a("./lib/alg/preorder"),prim:a("./lib/alg/prim"),tarjan:a("./lib/alg/tarjan"),topsort:a("./lib/alg/topsort"
+)},c.converter={json:a("./lib/converter/json.js")};var d=a("./lib/filter");c.filter={all:d.all,nodesFromList:d.nodesFromList},c.version=a("./lib/version")},{"./lib/CDigraph":30,"./lib/CGraph":31,"./lib/Digraph":32,"./lib/Graph":33,"./lib/alg/components":34,"./lib/alg/dijkstra":35,"./lib/alg/dijkstraAll":36,"./lib/alg/findCycles":37,"./lib/alg/floydWarshall":38,"./lib/alg/isAcyclic":39,"./lib/alg/postorder":40,"./lib/alg/preorder":41,"./lib/alg/prim":42,"./lib/alg/tarjan":43,"./lib/alg/topsort":44,"./lib/converter/json.js":46,"./lib/filter":47,"./lib/graph-converters":48,"./lib/version":50}],29:[function(a,b,c){function e(){this._value=undefined,this._nodes={},this._edges={},this._nextId=0}function f(a,b,c){(a[b]||(a[b]=new d)).add(c)}function g(a,b,c){var d=a[b];d.remove(c),d.size()===0&&delete a[b]}var d=a("cp-data").Set;b.exports=e,e.prototype.order=function(){return Object.keys(this._nodes).length},e.prototype.size=function(){return Object.keys(this._edges).length},e.prototype.graph=function(a){if(arguments.length===0)return this._value;this._value=a},e.prototype.hasNode=function(a){return a in this._nodes},e.prototype.node=function(a,b){var c=this._strictGetNode(a);if(arguments.length===1)return c.value;c.value=b},e.prototype.nodes=function(){var a=[];return this.eachNode(function(b){a.push(b)}),a},e.prototype.eachNode=function(a){for(var b in this._nodes){var c=this._nodes[b];a(c.id,c.value)}},e.prototype.hasEdge=function(a){return a in this._edges},e.prototype.edge=function(a,b){var c=this._strictGetEdge(a);if(arguments.length===1)return c.value;c.value=b},e.prototype.edges=function(){var a=[];return this.eachEdge(function(b){a.push(b)}),a},e.prototype.eachEdge=function(a){for(var b in this._edges){var c=this._edges[b];a(c.id,c.u,c.v,c.value)}},e.prototype.incidentNodes=function(a){var b=this._strictGetEdge(a);return[b.u,b.v]},e.prototype.addNode=function(a,b){if(a===undefined||a===null){do a="_"+ ++this._nextId;while(this.hasNode(a))}else if(this.hasNode(a))throw new Error("Graph already has node '"+a+"'");return this._nodes[a]={id:a,value:b},a},e.prototype.delNode=function(a){this._strictGetNode(a),this.incidentEdges(a).forEach(function(a){this.delEdge(a)},this),delete this._nodes[a]},e.prototype._addEdge=function(a,b,c,d,e,g){this._strictGetNode(b),this._strictGetNode(c);if(a===undefined||a===null){do a="_"+ ++this._nextId;while(this.hasEdge(a))}else if(this.hasEdge(a))throw new Error("Graph already has edge '"+a+"'");return this._edges[a]={id:a,u:b,v:c,value:d},f(e[c],b,a),f(g[b],c,a),a},e.prototype._delEdge=function(a,b,c){var d=this._strictGetEdge(a);g(b[d.v],d.u,a),g(c[d.u],d.v,a),delete this._edges[a]},e.prototype.copy=function(){var a=new this.constructor;return a.graph(this.graph()),this.eachNode(function(b,c){a.addNode(b,c)}),this.eachEdge(function(b,c,d,e){a.addEdge(b,c,d,e)}),a._nextId=this._nextId,a},e.prototype.filterNodes=function(a){var b=new this.constructor;return b.graph(this.graph()),this.eachNode(function(c,d){a(c)&&b.addNode(c,d)}),this.eachEdge(function(a,c,d,e){b.hasNode(c)&&b.hasNode(d)&&b.addEdge(a,c,d,e)}),b},e.prototype._strictGetNode=function(a){var b=this._nodes[a];if(b===undefined)throw new Error("Node '"+a+"' is not in graph");return b},e.prototype._strictGetEdge=function(a){var b=this._edges[a];if(b===undefined)throw new Error("Edge '"+a+"' is not in graph");return b}},{"cp-data":5}],30:[function(a,b,c){var d=a("./Digraph"),e=a("./compoundify"),f=e(d);b.exports=f,f.fromDigraph=function(a){var b=new f,c=a.graph();return c!==undefined&&b.graph(c),a.eachNode(function(a,c){c===undefined?b.addNode(a):b.addNode(a,c)}),a.eachEdge(function(a,c,d,e){e===undefined?b.addEdge(null,c,d):b.addEdge(null,c,d,e)}),b},f.prototype.toString=function(){return"CDigraph "+JSON.stringify(this,null,2)}},{"./Digraph":32,"./compoundify":45}],31:[function(a,b,c){var d=a("./Graph"),e=a("./compoundify"),f=e(d);b.exports=f,f.fromGraph=function(a){var b=new f,c=a.graph();return c!==undefined&&b.graph(c),a.eachNode(function(a,c){c===undefined?b.addNode(a):b.addNode(a,c)}),a.eachEdge(function(a,c,d,e){e===undefined?b.addEdge(null,c,d):b.addEdge(null,c,d,e)}),b},f.prototype.toString=function(){return"CGraph "+JSON.stringify(this,null,2)}},{"./Graph":33,"./compoundify":45}],32:[function(a,b,c){function g(){e.call(this),this._inEdges={},this._outEdges={}}var d=a("./util"),e=a("./BaseGraph"),f=a("cp-data").Set;b.exports=g,g.prototype=new e,g.prototype.constructor=g,g.prototype.isDirected=function(){return!0},g.prototype.successors=function(a){return this._strictGetNode(a),Object.keys(this._outEdges[a]).map(function(a){return this._nodes[a].id},this)},g.prototype.predecessors=function(a){return this._strictGetNode(a),Object.keys(this._inEdges[a]).map(function(a){return this._nodes[a].id},this)},g.prototype.neighbors=function(a){return f.union([this.successors(a),this.predecessors(a)]).keys()},g.prototype.sources=function(){var a=this;return this._filterNodes(function(b){return a.inEdges(b).length===0})},g.prototype.sinks=function(){var a=this;return this._filterNodes(function(b){return a.outEdges(b).length===0})},g.prototype.source=function(a){return this._strictGetEdge(a).u},g.prototype.target=function(a){return this._strictGetEdge(a).v},g.prototype.inEdges=function(a,b){this._strictGetNode(a);var c=f.union(d.values(this._inEdges[a])).keys();return arguments.length>1&&(this._strictGetNode(b),c=c.filter(function(a){return this.source(a)===b},this)),c},g.prototype.outEdges=function(a,b){this._strictGetNode(a);var c=f.union(d.values(this._outEdges[a])).keys();return arguments.length>1&&(this._strictGetNode(b),c=c.filter(function(a){return this.target(a)===b},this)),c},g.prototype.incidentEdges=function(a,b){return arguments.length>1?f.union([this.outEdges(a,b),this.outEdges(b,a)]).keys():f.union([this.inEdges(a),this.outEdges(a)]).keys()},g.prototype.toString=function(){return"Digraph "+JSON.stringify(this,null,2)},g.prototype.addNode=function(a,b){return a=e.prototype.addNode.call(this,a,b),this._inEdges[a]={},this._outEdges[a]={},a},g.prototype.delNode=function(a){e.prototype.delNode.call(this,a),delete this._inEdges[a],delete this._outEdges[a]},g.prototype.addEdge=function(a,b,c,d){return e.prototype._addEdge.call(this,a,b,c,d,this._inEdges,this._outEdges)},g.prototype.delEdge=function(a){e.prototype._delEdge.call(this,a,this._inEdges,this._outEdges)},g.prototype._filterNodes=function(a){var b=[];return this.eachNode(function(c){a(c)&&b.push(c)}),b}},{"./BaseGraph":29,"./util":49,"cp-data":5}],33:[function(a,b,c){function g(){e.call(this),this._incidentEdges={}}var d=a("./util"),e=a("./BaseGraph"),f=a("cp-data").Set;b.exports=g,g.prototype=new e,g.prototype.constructor=g,g.prototype.isDirected=function(){return!1},g.prototype.neighbors=function(a){return this._strictGetNode(a),Object.keys(this._incidentEdges[a]).map(function(a){return this._nodes[a].id},this)},g.prototype.incidentEdges=function(a,b){return this._strictGetNode(a),arguments.length>1?(this._strictGetNode(b),b in this._incidentEdges[a]?this._incidentEdges[a][b].keys():[]):f.union(d.values(this._incidentEdges[a])).keys()},g.prototype.toString=function(){return"Graph "+JSON.stringify(this,null,2)},g.prototype.addNode=function(a,b){return a=e.prototype.addNode.call(this,a,b),this._incidentEdges[a]={},a},g.prototype.delNode=function(a){e.prototype.delNode.call(this,a),delete this._incidentEdges[a]},g.prototype.addEdge=function(a,b,c,d){return e.prototype._addEdge.call(this,a,b,c,d,this._incidentEdges,this._incidentEdges)},g.prototype.delEdge=function(a){e.prototype._delEdge.call(this,a,this._incidentEdges,this._incidentEdges)}},{"./BaseGraph":29,"./util":49,"cp-data":5}],34:[function(a,b,c){function e(a){function e(b,d){c.has(b)||(c.add(b),d.push(b),a.neighbors(b).forEach(function(a){e(a,d)}))}var b=[],c=new d;return a.nodes().forEach(function(a){var c=[];e(a,c),c.length>0&&b.push(c)}),b}var d=a("cp-data").Set;b.exports=e},{"cp-data":5}],35:[function(a,b,c){function e(a,b,c,e){function h(b){var d=a.incidentNodes(b),e=d[0]!==i?d[0]:d[1],h=f[e],k=c(b),l=j.distance+k;if(k<0)throw new Error("dijkstra does not allow negative edge weights. Bad edge: "+b+" Weight: "+k);l<h.distance&&(h.distance=l,h.predecessor=i,g.decrease(e,l))}var f={},g=new d;c=c||function(){return 1},e=e||(a.isDirected()?function(b){return a.outEdges(b)}:function(b){return a.incidentEdges(b)}),a.eachNode(function(a){var c=a===b?0:Number.POSITIVE_INFINITY;f[a]={distance:c},g.add(a,c)});var i,j;while(g.size()>0){i=g.removeMin(),j=f[i];if(j.distance===Number.POSITIVE_INFINITY)break;e(i).forEach(h)}return f}var d=a("cp-data").PriorityQueue;b.exports=e},{"cp-data":5}],36:[function(a,b,c){function e(a,b,c){var e={};return a.eachNode(function(f){e[f]=d(a,f,b,c)}),e}var d=a("./dijkstra");b.exports=e},{"./dijkstra":35}],37:[function(a,b,c){function e(a){return d(a).filter(function(a){return a.length>1})}var d=a("./tarjan");b.exports=e},{"./tarjan":43}],38:[function(a,b,c){function d(a,b,c){var d={},e=a.nodes();return b=b||function(){return 1},c=c||(a.isDirected()?function(b){return a.outEdges(b)}:function(b){return a.incidentEdges(b)}),e.forEach(function(f){d[f]={},d[f][f]={distance:0},e.forEach(function(a){f!==a&&(d[f][a]={distance:Number.POSITIVE_INFINITY})}),c(f).forEach(function(c){var e=a.incidentNodes(c),h=e[0]!==f?e[0]:e[1],i=b(c);i<d[f][h].distance&&(d[f][h]={distance:i,predecessor:f})})}),e.forEach(function(a){var b=d[a];e.forEach(function(c){var f=d[c];e.forEach(function(c){var d=f[a],e=b[c],g=f[c],h=d.distance+e.distance;h<g.distance&&(g.distance=h,g.predecessor=e.predecessor)})})}),d}b.exports=d},{}],39:[function(a,b,c){function e(a){try{d(a)}catch(b){if(b instanceof d.CycleException)return!1;throw b}return!0}var d=a("./topsort");b.exports=e},{"./topsort":44}],40:[function(a,b,c){function e(a,b,c){function f(b,d){if(e.has(b))throw new Error("The input graph is not a tree: "+a);e.add(b),a.neighbors(b).forEach(function(a){a!==d&&f(a,b)}),c(b)}var e=new d;if(a.isDirected())throw new Error("This function only works for undirected graphs");f(b)}var d=a("cp-data").Set;b.exports=e},{"cp-data":5}],41:[function(a,b,c){function e(a,b,c){function f(b,d){if(e.has(b))throw new Error("The input graph is not a tree: "+a);e.add(b),c(b),a.neighbors(b).forEach(function(a){a!==d&&f(a,b)})}var e=new d;if(a.isDirected())throw new Error("This function only works for undirected graphs");f(b)}var d=a("cp-data").Set;b.exports=e},{"cp-data":5}],42:[function(a,b,c){function f(a,b){function i(c){var d=a.incidentNodes(c),e=d[0]!==h?d[0]:d[1],i=g.priority(e);if(i!==undefined){var j=b(c);j<i&&(f[e]=h,g.decrease(e,j))}}var c=new d,f={},g=new e,h;if(a.order()===0)return c;a.eachNode(function(a){g.add(a,Number.POSITIVE_INFINITY),c.addNode(a)}),g.decrease(a.nodes()[0],0);var j=!1;while(g.size()>0){h=g.removeMin();if(h in f)c.addEdge(null,h,f[h]);else{if(j)throw new Error("Input graph is not connected: "+a);j=!0}a.incidentEdges(h).forEach(i)}return c}var d=a("../Graph"),e=a("cp-data").PriorityQueue;b.exports=f},{"../Graph":33,"cp-data":5}],43:[function(a,b,c){function d(a){function f(h){var i=d[h]={onStack:!0,lowlink:b,index:b++};c.push(h),a.successors(h).forEach(function(a){a in d?d[a].onStack&&(i.lowlink=Math.min(i.lowlink,d[a].index)):(f(a),i.lowlink=Math.min(i.lowlink,d[a].lowlink))});if(i.lowlink===i.index){var j=[],k;do k=c.pop(),d[k].onStack=!1,j.push(k);while(h!==k);e.push(j)}}if(!a.isDirected())throw new Error("tarjan can only be applied to a directed graph. Bad input: "+a);var b=0,c=[],d={},e=[];return a.nodes().forEach(function(a){a in d||f(a)}),e}b.exports=d},{}],44:[function(a,b,c){function d(a){function f(g){if(g in c)throw new e;g in b||(c[g]=!0,b[g]=!0,a.predecessors(g).forEach(function(a){f(a)}),delete c[g],d.push(g))}if(!a.isDirected())throw new Error("topsort can only be applied to a directed graph. Bad input: "+a);var b={},c={},d=[],g=a.sinks();if(a.order()!==0&&g.length===0)throw new e;return a.sinks().forEach(function(a){f(a)}),d}function e(){}b.exports=d,d.CycleException=e,e.prototype.toString=function(){return"Graph has at least one cycle"}},{}],45:[function(a,b,c){function e(a){function b(){a.call(this),this._parents={},this._children={},this._children[null]=new d}return b.prototype=new a,b.prototype.constructor=b,b.prototype.parent=function(a,b){this._strictGetNode(a);if(arguments.length<2)return this._parents[a];if(a===b)throw new Error("Cannot make "+a+" a parent of itself");b!==null&&this._strictGetNode(b),this._children[this._parents[a]].remove(a),this._parents[a]=b,this._children[b].add(a)},b.prototype.children=function(a){return a!==null&&this._strictGetNode(a),this._children[a].keys()},b.prototype.addNode=function(b,c){return b=a.prototype.addNode.call(this,b,c),this._parents[b]=null,this._children[b]=new d,this._children[null].add(b),b},b.prototype.delNode=function(b){var c=this.parent(b);return this._children[b].keys().forEach(function(a){this.parent(a,c)},this),this._children[c].remove(b),delete this._parents[b],delete this._children[b],a.prototype.delNode.call(this,b)},b.prototype.copy=function(){var b=a.prototype.copy.call(this);return this.nodes().forEach(function(a){b.parent(a,this.parent(a))},this),b},b.prototype.filterNodes=function(b){function f(a){var b=c.parent(a);return b===null||d.hasNode(b)?(e[a]=b,b):b in e?e[b]:f(b)}var c=this,d=a.prototype.filterNodes.call(this,b),e={};return d.eachNode(function(a){d.parent(a,f(a))}),d},b}var d=a("cp-data").Set;b.exports=e},{"cp-data":5}],46:[function(a,b,c){function h(a){return Object.prototype.toString.call(a).slice(8,-1)}var d=a("../Graph"),e=a("../Digraph"),f=a("../CGraph"),g=a("../CDigraph");c.decode=function(a,b,c){c=c||e;if(h(a)!=="Array")throw new Error("nodes is not an Array");if(h(b)!=="Array")throw new Error("edges is not an Array");if(typeof c=="string")switch(c){case"graph":c=d;break;case"digraph":c=e;break;case"cgraph":c=f;break;case"cdigraph":c=g;break;default:throw new Error("Unrecognized graph type: "+c)}var i=new c;return a.forEach(function(a){i.addNode(a.id,a.value)}),i.parent&&a.forEach(function(a){a.children&&a.children.forEach(function(b){i.parent(b,a.id)})}),b.forEach(function(a){i.addEdge(a.id,a.u,a.v,a.value)}),i},c.encode=function(a){var b=[],c=[];a.eachNode(function(c,d){var e={id:c,value:d};if(a.children){var f=a.children(c);f.length&&(e.children=f)}b.push(e)}),a.eachEdge(function(a,b,d,e){c.push({id:a,u:b,v:d,value:e})});var h;if(a instanceof g)h="cdigraph";else if(a instanceof f)h="cgraph";else if(a instanceof e)h="digraph";else if(a instanceof d)h="graph";else throw new Error("Couldn't determine type of graph: "+a);return{nodes:b,edges:c,type:h}}},{"../CDigraph":30,"../CGraph":31,"../Digraph":32,"../Graph":33}],47:[function(a,b,c){var d=a("cp-data").Set;c.all=function(){return function(){return!0}},c.nodesFromList=function(a){var b=new d(a);return function(a){return b.has(a)}}},{"cp-data":5}],48:[function(a,b,c){var d=a("./Graph"),e=a("./Digraph");d.prototype.toDigraph=d.prototype.asDirected=function(){var a=new e;return this.eachNode(function(b,c){a.addNode(b,c)}),this.eachEdge(function(b,c,d,e){a.addEdge(null,c,d,e),a.addEdge(null,d,c,e)}),a},e.prototype.toGraph=e.prototype.asUndirected=function(){var a=new d;return this.eachNode(function(b,c){a.addNode(b,c)}),this.eachEdge(function(b,c,d,e){a.addEdge(b,c,d,e)}),a}},{"./Digraph":32,"./Graph":33}],49:[function(a,b,c){c.values=function(a){var b=Object.keys(a),c=b.length,d=new Array(c),e;for(e=0;e<c;++e)d[e]=a[b[e]];return d}},{}],50:[function(a,b,c){b.exports="0.7.4"},{}]},{},[1]);
\ No newline at end of file