Python rewriting
We do not run Gunicorn in daemon mode
precise version of gunicorn don't like --pythonpath
add an icon
add a category
move ports control to the python-django charm
modify the docs for the port exposition changes
merging lp:~patrick-hetu/charms/precise/gunicorn/python-rewrite as per https://code.launchpad.net/~patrick-hetu/charms/precise/gunicorn/python-rewrite/+merge/167088