Large Launch Related Release Including...

FIX: Launch in OpenStack with tags
FIX: Default security groups should include 'gonzo' and server_type

NEW: Specify additional security groups with the --additional-security-groups launch argument
NEW: CloudInit support. Support for using user-data from file or URL and parameterising using jinja2. Defaults are specified in cloud configurations and can be overridden/supplemented by using command line arguments.