gameObjects:
--- ExtraBallPower: Fixed the index call so that the new ball really flips the y-direction.

gameBoard:
* Clarified arithmetic of paddle start x.
* Added documentation for the gametimer and doubled the speed of the game as well as shortened the delay.
* Updated documentation for randomEnum and for one of its usages.
* Added documentation for the GameTask.
* Cleaned up test code.