TitleScene now shows A and B "buttons" to start a game.
PlayScene now shows just the level name in the HUD.
Lots of new helpers added to scale and align rects where I want them.
I've imported some of the "character" images from ArduLO, converted to
GIFs because they're easier to work with. They've been imported into a
new Bitmaps structure so they only need to be loaded once at app start.
I've also cleaned up some of the drawing code, and created a series of
helpers for dividing Rects into a 3x3 grid, to make it easier to define
the layout. I've also stubbed out "theme-support". :)
* Added a proper event loop
* Added minimal menu bars
* Added about menu
* GameWindow initializes a GameEngine (even if you can't play it yet)
* Updated variable naming conventions
* Added base "Hello MacLO" app
* Added first attempt at porting game engine from [ArduLO](https://github.com/jonthysell/ArduLO)
* Added README.md and LICENSE.md
