events: start_add_batch and end_add_batch. The parameter is a batch
id which is generated on the first add request. The protocol is call
the add_photo as many times as required and then call finish when
done.
Also renamed the add method in local_import to add_photo so it is
consistent with simple_uploader
1) Upload requests are serialized so we don't over load the server or get
race conditions occurring.
2) new albums are created based on the file structure of the
authorized path that is the source directory.
2) Defines a routining pattern for module administration controllers. URI's of the form admin/module/method/parameters gets remapped into module_admin/method/parameters. This will result in the lookup of the the controller Module_Admin_Controller