* Added note version controller and test

* Added pool version controller and test
* Refactored unit tests for post disapprovals
* Renamed PostModerationDetail to PostDisapproval

app/models/post_disapproval.rb

@@ -0,0 +1,11 @@
+class PostDisapproval < ActiveRecord::Base
+  belongs_to :post
+  belongs_to :user
+  validates_uniqueness_of :post_id, :scope => [:user_id]
+  
+  def self.prune!
+    joins(:post).where("posts.is_pending = FALSE AND posts.is_flagged = FALSE").select("post_disapprovals.*").each do |post_disapproval|
+      post_disapproval.destroy
+    end
+  end
+end