- got rid of scenes GameOverOffTheEdge and GameOverTimesUp in preparation for being able to retry a level without reloading the level
 - now using custom events 'PauseGame' and 'UnpauseGame' instead of Crafty.pause() so that 'EnterFrame' events are still triggered when the game is paused
 - changed most text to be yellow with a black text-shadow
 - added Dmitriy's idea of hidden ground to notes
 - retrying a level after game over is now faster since its no longer reloading the level data
 - changed most text from yellow to blue with a black outline so that the blue text is still visible on a blue background
- the Breaking component can now be restored once broken via the restoreAsUnbroken method
- the Car component is now restored to initial state correctly via the setPosition method