grafx - Extensible Java Graphics Package Code

Adding alternate SVN checkout URL to web page.

In web page adding instructions on how to obtain project files from Subversion.

Adding a higher quality version of 'rocketman' audio clip.

In ModernAudioClip, changing the default unpaused state to be 0 instead of -1.
Finally, adding some insightful comments to _ensureState(). I think this audio
system is now nearing completion. I don't see how we can improve it any more.

Changing the STOP value of m_startedMillis from -1 to 0.

Improving comments & Javadoc in ModernAudioClip.

Adding a TODO comment to .generate-audio-track.sh.

Implementing TRIES = 3 in ModernAudioClip.

In _ensureState() refining the waiting strategy. These multi-threaded issues
are always very challenging to solve.

Trying to condense code in ModernAudioClip a little bit by defining and making
use of _clip_start() & _clip_loop().