Add explicit access_types from the url
This does two things, it reduces the amount of repeated data (e.g.,
the checkAccess used to repeat the access_type that was already
specified in the url). At the same time, it allows for example the
'create' page to push its access_type to 'edit'.
Patch by: Sverre Rabbelier
"""Multi-consumer multi-producer dispatching mechanism
Originally based on pydispatch (BSD) http://pypi.python.org/pypi/PyDispatcher/2.0.1
See license.txt for original license.
Heavily modified for Django's purposes.
"""
from django.dispatch.dispatcher import Signal