Changed how the TetrisBoard stores the board.
The algorithm are lot faster, a specily on bigger boards.

The graphic is changed in order to adjust to the board changes.
Changes in class Square.
And changes in other files to adjust to these changes.
The tetrisgame is now drawn inside the big square.
No opengl scissors needed to fix the graphic.
Updates sound names.
Fixed layout in a switch statement.
Removed all randomness from TetrisBoard to player.
And changes to adjust to these changes.

There was also a bug fix conserning external rows. Implementation of that was missing.
Bug fix.
Next block was not sent correctly to remote players is now fixed.

Under some circumstances a full lines was not removed, should be fixed now.