Demo for query storing

Change-Id: I947bcac841992c3f6cfd01ab337c265b0d01cb70
diff --git a/node_modules/extend/index.js b/node_modules/extend/index.js
new file mode 100644
index 0000000..2aa3faa
--- /dev/null
+++ b/node_modules/extend/index.js
@@ -0,0 +1,117 @@
+'use strict';
+
+var hasOwn = Object.prototype.hasOwnProperty;
+var toStr = Object.prototype.toString;
+var defineProperty = Object.defineProperty;
+var gOPD = Object.getOwnPropertyDescriptor;
+
+var isArray = function isArray(arr) {
+	if (typeof Array.isArray === 'function') {
+		return Array.isArray(arr);
+	}
+
+	return toStr.call(arr) === '[object Array]';
+};
+
+var isPlainObject = function isPlainObject(obj) {
+	if (!obj || toStr.call(obj) !== '[object Object]') {
+		return false;
+	}
+
+	var hasOwnConstructor = hasOwn.call(obj, 'constructor');
+	var hasIsPrototypeOf = obj.constructor && obj.constructor.prototype && hasOwn.call(obj.constructor.prototype, 'isPrototypeOf');
+	// Not own constructor property must be Object
+	if (obj.constructor && !hasOwnConstructor && !hasIsPrototypeOf) {
+		return false;
+	}
+
+	// Own properties are enumerated firstly, so to speed up,
+	// if last one is own, then all properties are own.
+	var key;
+	for (key in obj) { /**/ }
+
+	return typeof key === 'undefined' || hasOwn.call(obj, key);
+};
+
+// If name is '__proto__', and Object.defineProperty is available, define __proto__ as an own property on target
+var setProperty = function setProperty(target, options) {
+	if (defineProperty && options.name === '__proto__') {
+		defineProperty(target, options.name, {
+			enumerable: true,
+			configurable: true,
+			value: options.newValue,
+			writable: true
+		});
+	} else {
+		target[options.name] = options.newValue;
+	}
+};
+
+// Return undefined instead of __proto__ if '__proto__' is not an own property
+var getProperty = function getProperty(obj, name) {
+	if (name === '__proto__') {
+		if (!hasOwn.call(obj, name)) {
+			return void 0;
+		} else if (gOPD) {
+			// In early versions of node, obj['__proto__'] is buggy when obj has
+			// __proto__ as an own property. Object.getOwnPropertyDescriptor() works.
+			return gOPD(obj, name).value;
+		}
+	}
+
+	return obj[name];
+};
+
+module.exports = function extend() {
+	var options, name, src, copy, copyIsArray, clone;
+	var target = arguments[0];
+	var i = 1;
+	var length = arguments.length;
+	var deep = false;
+
+	// Handle a deep copy situation
+	if (typeof target === 'boolean') {
+		deep = target;
+		target = arguments[1] || {};
+		// skip the boolean and the target
+		i = 2;
+	}
+	if (target == null || (typeof target !== 'object' && typeof target !== 'function')) {
+		target = {};
+	}
+
+	for (; i < length; ++i) {
+		options = arguments[i];
+		// Only deal with non-null/undefined values
+		if (options != null) {
+			// Extend the base object
+			for (name in options) {
+				src = getProperty(target, name);
+				copy = getProperty(options, name);
+
+				// Prevent never-ending loop
+				if (target !== copy) {
+					// Recurse if we're merging plain objects or arrays
+					if (deep && copy && (isPlainObject(copy) || (copyIsArray = isArray(copy)))) {
+						if (copyIsArray) {
+							copyIsArray = false;
+							clone = src && isArray(src) ? src : [];
+						} else {
+							clone = src && isPlainObject(src) ? src : {};
+						}
+
+						// Never move original objects, clone them
+						setProperty(target, { name: name, newValue: extend(deep, clone, copy) });
+
+					// Don't bring in undefined values
+					} else if (typeof copy !== 'undefined') {
+						setProperty(target, { name: name, newValue: copy });
+					}
+				}
+			}
+		}
+	}
+
+	// Return the modified object
+	return target;
+};