Changed reference of hand to phand

Changed reference of hand to phand to avoid consufion between hand type
objects and the reference to an array in this class.
Handling score from client added.Winner method added

1.)Now server can handle message from client regarding score of the
client. BUT I still don't know where to call the getStrength method for
the specific client that would calculate the score for the client's
respective hand.

2.)Winner method added to class poker that compares the scores of all
clients connected and returns the winner's index (int
value)corresponding to the  winner's position in the playerList instance
variable of class Poker. I don't know where you would call this method
however.