Bug 927: demos/es2/av/CrossFadePlayer
Parallel media player that demonstrate CrossFade of audio volume during playback.
This player also demonstrate audio only playback of the GLMediaPlayer.

The CrossFadePlayer is a reproducer for
FFMPEGMediaPlayer libav multithreading initialization errors.
[NULL @ 0x7ff904065280] insufficient thread locking around avcodec_open/close()

reproducer:
java -cp gluegen/build/gluegen-rt.jar:jogl/build/jar/jogl-all-mobile.jar:jogl/build/jar/jogl-test.jar:joal/build/jar/joal.jar com.jogamp.opengl.test.junit.jogl.demos.es2.av.CrossFadePlayer *.mp3

Signed-off-by: Xerxes Rånby <xerxes@zafena.se>
Merge remote-tracking branch 'xranby/master'