Adding new file daemon.py, courtesy of Sander Marechal <http://www.jejik.com/articles/2007/02/a_simple_unix_linux_daemon_in_python/>
Merge branch 'master' into daemon
Adding support for the daemon class from daemon.py to rabbitmq_consumer.py
Usage is now ./rabbitmq_consumer.py (start|stop|restart|status)
Adding support for the Daemon class of daemon.py to rabbitmq_producer.py
Usage is now ./rabbitmq_producer.py (start|stop|restart|status)
Uses pidfile config settings in rabbitmq.cfg