grafx - Extensible Java Graphics Package Code

Adding scripts/launch-impossible-level-test.sh.

Augmenting TODO.txt, explaining how we could do an animated CLEARED_LAYERS
where multiples are being cleared.

In SimpleGameLogic, now waiting for LEVEL_FINISHED and GAME_OVER events to be
processed before invoking m_gamestateListener. This is how other static events
are handled: you wait for the event to be processed before proceeding.

Necessary changes for getting launcher script to work.

Adding scripts/launch-level-playback.sh.

Updating TODO.txt with info about A.I.

Implemented launch-nightmare-mode-test.sh.

Adding placeholder for launch-nightmare-mode-test.sh.

Fine-tuning compile-video.sh. It works wonderfully. Many borderline cases
tested.

Adding some additional output statements.