Merge with 012451a812f1abd21e7e30f887f8f2ba90f58b4b
"""Multi-consumer multi-producer dispatching mechanismOriginally based on pydispatch (BSD) http://pypi.python.org/pypi/PyDispatcher/2.0.1See license.txt for original license.Heavily modified for Django's purposes."""fromdjango.dispatch.dispatcherimportSignal