isDebug now also checks melange version
To facilitate this getMelangeVersion was introduced and in order to
not show the 'Flush Cache' button a isLocal method was also added.
Patch by: Sverre Rabbelier
"""Multi-consumer multi-producer dispatching mechanism
Originally based on pydispatch (BSD) http://pypi.python.org/pypi/PyDispatcher/2.0.1
See license.txt for original license.
Heavily modified for Django's purposes.
"""
from django.dispatch.dispatcher import Signal