- Fixed reference to old non-singleton Screen class
- Added Screen.width/Screen.height
- Fixed Screen property definitions (again copy/paste errors)
- Fixed context of draw loop / requestAnimationFrame
- Passed canvas reference to draw event handlers
- Update now happens after draw
- State now (properly) extends the base class
- Added require.min.js for the example
- added example.html "Hello World"

- properly defined push/pop-State
- Fixed singleton code referencing Screen due to copy/paste errors
- Properly closed defines
- Fixed missing semicolons