* fixed usage of group_names in *_change_receiver
group_names was missing second arg (action)
* fixed group_names to include action
* made group_names a classmethod
* Implement the data binding behaviour from Django DDP.
Correct dispatch of create/update/delete according to how group_names change
when compared between pre and post save/delete.
* Fix tests for databinding improvements.
* Added get_handler
Added a get_handler method that applies decorators to the consumer-classmethod
* added imports for decorators
* Added get_handler to WebsocketBinding
* Fixed missing import
* channel_session_user defaults to True
* removed user-transfer from http
would only work in a connect-method
* removed unused import
If the declaration of a binding happens after the ``ready``-method of channels has run, the binding was not registered. With this it will be registered at declaration. This also ensures that no registration happens before the ``ready``-method runs.