Cleaned up overly enthousiastic comments
From the styleguide:
On the other hand, never describe the code. Assume the person reading
the code knows Python (though not what you're trying to do) better
than you do.
Patch by: Sverre Rabbelier
from django.dispatch import Signal
request_started = Signal()
request_finished = Signal()
got_request_exception = Signal(providing_args=["request"])