Use unpkg for dependencies in the example app

Author: g1eb

index.html

@@ -27,8 +27,9 @@
     on-close="closed()">
   </datetime-range>
 
-  <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.0/angular.min.js" charset="utf-8"></script>
-  <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.12.0/moment.min.js" charset="utf-8"></script>
+  <script src="https://unpkg.com/moment@2.13.0/min/moment.min.js" charset="utf-8"></script>
+  <script src="https://unpkg.com/angular@1.5.6/angular.min.js" charset="utf-8"></script>
+
   <script src="dist/datetime-range.min.js"></script>
 
   <script>