grafx - Extensible Java Graphics Package Code

Once again removing 'Audio.java' in base package.

Overhaul of ModernAudioClip. It now works with only 1.3 code. It also waits
for stop or start events, to some extent. Still needs more extensive testing.

Fixed this demo code called 'Audio.java'. Now I need to transfer this
knowledge to ModernAudioClip.

Resurrecting Audio.java, need to figure out strategy in isolation.

Moving code from the temporary 'Audio.java' into proper location, namely file
'ModernAudioClip.java'. There is an issue with stopping/playing, which will be
addressed soon.

Adding file 'Audio.java' in base package which shows how to solve the audio
problems by creating another type of stream. I would like to revert to using
only 1.3 code eventually as well. This is a very temporary file, as having it
here will likely break some kind of build process. Just checking in for
reference.

Adding nightmare level 7.

Changing height of nightmare levels from 11 to 12.

Supporting '--noaudio' in LaunchTetrisTest.java.

Supporting '--noaudio' in launch-tetris.sh.