Tidy up files

Sort out tabbing in shutdown hook
Remove unused dependancies from pom
Comment log4j.properties
Can now configure up zmq

Can now configure zmq in log4j.properties:
* SocketType: PUSHPULL | PUBSUB
* BindConnect: BIND | CONNECT
* Linger (Time to wait to close socket)
* Endpoints: protocol://hostname:port,protocol://hostname:port
 (Comma separated list)