* Added note version controller and test

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

app/models/note_version.rb

@@ -1,4 +1,11 @@
 class NoteVersion < ActiveRecord::Base
+  before_validation :initialize_updater
+  
+  def initialize_updater
+    self.updater_id = CurrentUser.id
+    self.updater_ip_addr = CurrentUser.ip_addr
+  end
+
   def updater_name
     User.id_to_name(updater_id)
   end