added gunicorn to INSTALLED_APPS in settings.py

git-svn-id: https://svn.eionet.europa.eu/repositories/Python/flis.live_catalogue@135 60810c31-268d-49e0-9aa7-0fbff4fae3ae
Merge branch 'master' of github.com:eaudeweb/flis.live_catalogue

git-svn-id: https://svn.eionet.europa.eu/repositories/Python/flis.live_catalogue@136 60810c31-268d-49e0-9aa7-0fbff4fae3ae
added Fabric deployment - not yet fully functional
Merge branch 'master' of github.com:eaudeweb/flis.live_catalogue