allow to override type of players

simplified card creation

set id in fromJson

added Swing implementation of ClientGame. Not functional

fixed some NPEs and implemented updateGame method

updated receive (see last commit) and moved some init steps to their own methods

rewrote receive to not re-create InputStream and added back some methods from ServerGame

fixed NPE in Card for CardInfo

moved socket to ClientGame and fixed Listener

added initial connection code

added main testing class

added Card and CardInfo classes

added Player class

re-factored Game structure, implementation of network protocol

initial game commit