Implement forum topic voting and tag change pruning (#3580)

app/assets/javascripts/application.js

@@ -8,6 +8,6 @@
 //= require jquery.qtip.js
 //= require ugoira_player.js
 //= require stupidtable.js
-//= require rails.js
+//= require rails-ujs
 //= require common.js
 //= require_tree .

app/assets/javascripts/forum_post_votes_controller.js

@@ -0,0 +1,2 @@
+// Place all the behaviors and hooks related to the matching controller here.
+// All this logic will automatically be available in application.js.