* Development 15 | Beta 0 | Development 1 | Experimental 3 *

* Changed the type of the tileSize and startY variables in TileMap2D to
doubles instead of integers

* Fixed bug: A null tile in TileMap2D caused a NullPointerException
* Fixed bug: The delta value was always 0, this will cause movement and
velocities to move
             alot faster now
* Fixed bug: JavaWindow was calling Thread.sleep() with a minus number
causeing an excpetion
             on slower computers