'clara impi': do not append 'imm' when host is an IP address. Fix #35
'clara images create': only stop puppet and dbus daemons if they're installed.
add new functions in clara/utils:

- clara_edit: replaces sys.exit. Shows the message using logging and exists returning 1
- initialize_logger: starts the logging handlers
Add logging to clara. Fix #26
Packaging updates for clara
Run sudo if you launch clara as a normal user.