Added request creation and processing to role.py. This is used if you want to request to become a certain role for a group. For instance becoming a club member. The process request view will also be used to cancel outstanding invites might this be necessary. Patch by: Lennard de Rijk Reviewed by: to-be-reviewed

"""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