Fix miscaching of homepage
Add system.getHostname() and system.getAppVersion() to the homepage
key so that we do not use an wrong version.
"""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