Move all order logic to models

- Have a default order for each model
-- The overall default is ID DESC
- Allow for custom orderings
-- When comma-separated IDs are used

app/controllers/mod_actions_controller.rb

@@ -2,7 +2,7 @@ class ModActionsController < ApplicationController
   respond_to :html, :xml, :json
 
   def index
-    @mod_actions = ModAction.search(params[:search]).order("id desc").paginate(params[:page], :limit => params[:limit])
+    @mod_actions = ModAction.search(params[:search]).paginate(params[:page], :limit => params[:limit])
     respond_with(@mod_actions)
   end
 end