Added agreed_to_tos_on field in user and role model.
Also the user and user_self view no properly handle this new field.
The ToS will be shown on-screen (not in a nice way) only if it is in effect and a user has not signed it yet.
Patch by: Lennard de Rijk
Reviewed by: to-be-reviewed
from django.dispatch import Signal
request_started = Signal()
request_finished = Signal()
got_request_exception = Signal(providing_args=["request"])