+ Added proxies, mainly so that game screen can not be resized during a game
+ Added onOpening and onClosing methods to MyScreen
* Moved ButtonState to GameButton
* Buttons are now a centimeter in size, so that the size is consistent between different screen pixel densities
* Buttons are now spaced evenly among the screen, independently the horizontal and vertical axes
* Screen set to not be resizable during a game, and reset to being resizable as soon as the screen changes