Began guava eventbus implementation

* Renamed all instances of 'Packet' to 'Message'
Continued implementing eventbus

* updated README with logging/eclipse setup instructions
* changed Keepalive to use a private copy of a Ping message
* renamed message to rawMessage in the MessageRouter and its interface
* Added ability to retrieve the thread ScrollsConnection starts so you
can .join on it
* Created ScrollsLoadBalancer utility class for obtaining a Scrolls
lobby ip address with ease
* Added log4j.properties file at the debug level