Includes url_for into the host class (e.g. an abstract
controller or mailer). The class has to provide a RouteSet by
implementing the _routes methods. Otherwise, an exception will
be raised.
Note that this module is completely decoupled from HTTP - the only
requirement is a valid  _routes implementation.
Namespace
    - MODULE AbstractController::AssetPaths
 - MODULE AbstractController::Callbacks
 - MODULE AbstractController::Collector
 - MODULE AbstractController::Helpers
 - MODULE AbstractController::Layouts
 - MODULE AbstractController::Logger
 - MODULE AbstractController::Railties
 - MODULE AbstractController::Rendering
 - MODULE AbstractController::Translation
 - MODULE AbstractController::UrlFor
 - MODULE AbstractController::ViewPaths
 - CLASS AbstractController::ActionNotFound
 - CLASS AbstractController::Base
 - CLASS AbstractController::DoubleRenderError
 - CLASS AbstractController::Error