grafx - Extensible Java Graphics Package Code

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().

In ModernAudioClip, adding a couple of comments and replacing an idential piece
of code with _internalStop().

Reporting errors during "instantiation" in ModernAudioClip. Before, errors
were silently ignored.

Fixing issues with the 'pause Schuld'.

Removing ModernAudioClipOld.

Incrementing m_lastLoopMillis with the pause "deficit". Still need PLAY.

Trying out background music, with pause and resume. It works.

Beginning to test background music in computer player level action.

Beginning to test 'rocketman' background music.