Fixes for Grunt task, minified version added, update index.html demo page

Author: dotansimha

Gruntfile.js

@@ -55,7 +55,8 @@ module.exports = function(grunt) {
 						moment:		false,
 						Pikaday: false,
 						module: false,
-						forge: false
+						forge: false,
+						"_": false
 					}
 				},
 				beforeconcat:   {

angularjs-dropdown-multiselect.js

@@ -58,7 +58,7 @@ directiveModule.directive('ngDropdownMultiselect', ['$filter', '$document', func
 					var target = e.target.parentElement;
 					var parentFound = false;
 
-					while (angular.isDefined(target) && target != null && !parentFound) {
+					while (angular.isDefined(target) && target !== null && !parentFound) {
 						if (_.contains(target.classList, 'multiselect-parent') && !parentFound) {
 							parentFound = true;
 						}

angularjs-dropdown-multiselect.min.js

@@ -17,8 +17,8 @@
     <script type="text/javascript" src="bower_components/highlightjs/highlight.pack.js"></script>
     <script type="text/javascript" src="bower_components/angular-highlightjs/angular-highlightjs.min.js"></script>
 
-	<script type="text/javascript" src="angularjs-dropdown-multiselect.js"></script>
-	<!--<script type="text/javascript" src="angularjs-dropdown-multiselect.min.js"></script>-->
+    <!--<script type="text/javascript" src="angularjs-dropdown-multiselect.js"></script>-->
+    <script type="text/javascript" src="angularjs-dropdown-multiselect.min.js"></script>
 
 	<script type="text/javascript" src="app.js"></script>
 	<script type="text/javascript" src="pages/home/ExampleCtrl.js"></script>