added post pruner, added mod action notifications when approving/deleting posts

app/models/mod_action.rb

@@ -1,3 +1,8 @@
 class ModAction < ActiveRecord::Base
   belongs_to :creator, :class_name => "User"
+  before_validation :initialize_creator, :on => :create
+  
+  def initialize_creator
+    self.creator_id = CurrentUser.id
+  end
 end