No longer use add/remove events on collection, instead use update. This

greatly improves performance.

@@ -77,6 +77,6 @@ define(function(require) {
                 }
             },
         };
-    })(Backbone.Model, Backbone.Collection, 'add remove reset sort');
+    })(Backbone.Model, Backbone.Collection, 'reset sort update');
     return adapter;
 });