adds cache to votes on Debates

app/models/debate.rb

@@ -40,15 +40,15 @@ class Debate < ActiveRecord::Base
   end
 
   def likes
-    get_likes.size
+    cached_votes_up
   end
 
   def dislikes
-    get_dislikes.size
+    cached_votes_down
   end
 
   def total_votes
-    votes_for.size
+    cached_votes_total
   end
 
   def editable?