Auto start sender_server initial attemps works
First attemp to integrate multicast, not working

modified method signiture to have userlist passed in; not clear on
multicast msg construction
Multicast seems work
Change MSGTYPE to enum with interface for converting between string
Get Listener works for new message format
Update message wrapper

this class wrapps message passed by Erlang layer and deliver to client
for easy parse, including srcName, srcIp, type and payload
Revert "Update message wrapper"

This reverts commit 112353cf9d05196ab03fd696d4aea8856a017ab9.
Update message wrapper; change NameIpPort to User to be more readable

Message class wraps message passed by Erlang layer and deliver to
client for easy parse
Fixed listener and multicast. Currently the listener can parse playerId, srcIp, type and payload

TODO: game logic and replace all messaging interface