Reorganising project to match JavaEE standarts

Moving socket-related input to web project;
       game-related EJB to EJB project;
       servelets to another web project.

This verion is still unstable - servelet has not been migrated yet,
  and CardsSocket refuses to locate GameProvider from EJB project
Completing reorganising

"Business logic"-beans are now in separate project.
WebSocket game-relevant classes are fixed to inject EJBs correctly.