updating doTurn()
merge head fix
changes to doTurn, added a method which determines 4 of a kind in a hand, and fixed a return statement in userinterface
finished doTurn and associated functions in HumanPlayer, added removefullset method in Hand class
added a getscore method for humanplayer
 Added main menu display and input getting, now the outer game loop can call it with while(UserInterface.getMenuInput())