1) Item_Controller::_create() and _update() were swapped
2) _create() was redirecting to the wrong urls on success
3) Change in-place return parameter from __return to _return
4) Change in-place code to tunnel _put via POST
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.
