Add scroll-events dependency to the example app

Author: g1eb

index.html

@@ -29,6 +29,7 @@
 
   <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="https://unpkg.com/angular-scroll-events@0.0.2/dist/scroll-events.min.js" charset="utf-8"></script>
 
   <script src="dist/datetime-range.min.js"></script>