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

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from django.dispatch import Signal

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request_started = Signal()

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request_finished = Signal()

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got_request_exception = Signal(providing_args=["request"])