controllers. Any controller that wants to act RESTful can extend this
class and implement get/post/put/delete.
Tweak default routes to disallow direct access to the REST controller
and direct access to any REST methods.
Create Item_Controller as a common superclass for Album_Controller and
Photo_Controller. Change routes to route requests to Item_Controller
for dispatching, which in turn will generate get/post/put/delete
requests to the controlller so that each controller has a RESTful
surface.
Change in_place editing to take advantage of this.
