Revert r2376 since it's not needed as discussed in Issue 188.
http://code.google.com/p/soc/issues/detail?id=188
Patch by: Pawel Solyga
Reviewed by: to-be-reviewed
from django.dispatch import Signalrequest_started = Signal()request_finished = Signal()got_request_exception = Signal(providing_args=["request"])