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
from django.dispatch import Signal
class_prepared = Signal(providing_args=["class"])
pre_init = Signal(providing_args=["instance", "args", "kwargs"])
post_init = Signal(providing_args=["instance"])
pre_save = Signal(providing_args=["instance", "raw"])
post_save = Signal(providing_args=["instance", "raw", "created"])
pre_delete = Signal(providing_args=["instance"])
post_delete = Signal(providing_args=["instance"])
post_syncdb = Signal(providing_args=["class", "app", "created_models", "verbosity", "interactive"])