Add bootstrap-sprockets to js manifest

Author: mbreining

app/assets/javascripts/application.js

@@ -13,6 +13,8 @@
 //= require jquery
 //= require jquery_ujs
 
+//= require bootstrap-sprockets
+
 // Important to import jquery_ujs before rails-bundle as that patches jquery xhr to use the authenticity token!
 
 //= require rails-bundle