Changed MazewarServer to lightweight naming service and implemented registration to naming service
* Added ConnectionListener(Thread to listen to connection request) and PacketListener(Thread to listen to the packets from a particular clients)
* Implemented initialization of a serversocket at start up and connection to all existing players
* Added action queue and ack tracker
* Implemented part of client join logic
* Finished implementing add-client logic
* Refactor some multicast code