Added a merge_params and check_access decorator
The merge_params decorator is very simple and takes self._params and
merges it with params. It's main purpose is to explicitly mark the
views in which it is intended that self._params is merged raw.
The check_access decorator factors out the access checking process
and passes args and kwargs to the access checking methods.
Patch by: Sverre Rabbelier
Prepare access to receive args and kwargs as argument
Also use two "magic values" when the sidebar is doing the access
checks, this might be useful later.
Patch by: Sverre Rabbelier