NON-tested: Should now implement new GUI features:

* Update the number of players who have answered the current question
* Keep track of who answered what.
* Add points to the players when the next question is added
* Updates the ListWidget of QuestionForm, when groups answer
* Player.getScore() returns the sum.
Game serer GUI now works!
Merge pull request #1 from swiatecki/Final-GUI

Final gui