tags: automatically fix incorrect tag counts during maintenance.

* Automatically fix all tags with incorrect counts during daily
  maintenance (previously only tags with negative counts were fixed).
* Log fixed tags to NewRelic.
* Remove the ability to manually fix tag counts with the "Fix" button on
  the /tags listing. This is no longer necessary now that tags are
  fixed automatically.

config/routes.rb

@@ -260,7 +260,6 @@ Rails.application.routes.draw do
   end
   resource :source, :only => [:show]
   resources :tags do
-    resource :correction, :only => [:new, :create, :show], :controller => "tag_corrections"
     collection do
       get :autocomplete
     end