Correct package, working fine. Only 2 main errors:

-Synchronization after login/relogin : we need to lose a game in
between, i've been trying to resolve the problem but everything got
messed everytime. I have a tricky solution, but will work correctly only
with 2 clients: modify condition in startGame() in IGameServerImpl to
start the game after 2 clients (it isn't elegant so i want to wait for
your opinion)

-build.xml is not working in this package configuration. I'm trying to
resolve it, but i also have a non elegant solution: replicate impl
inside both server and client and replace GUI back inside the client
(also waiting for your opinion)

-Also, we should do more documentation (only authors and class names)