upstart: remove old container before start
debian: fixed build fail when .tox is missing
added "settings" module
added Dockerfile for deploy-image
utils: added "groupby" function
utils: nova functions now use settings
utils: function to get datacenter from racktables
utils: added "aslist" function
"main" function moved to "actions" module
action-related function moved from entities to action.py
actions.py: new "deploy" action, massive refactoring
__init__.py: explicitly import other symbols
setup.py: added settings.yaml
setup.py: argh replaced with docopt, added structlog