grafx - Extensible Java Graphics Package Code

Changing pix_fmt to the one that isn't deprecated and which still works in most
browsers.

Adding data/copyright-watermark-1280x720.png.

Adding ffmpeg-overlay.sh for watermark in videos.

Adjusting epsilon and qSearchBreadth again.

Adding tricky-computer-moves.blo.

Another computer player problem it seems.

Reducing PLUG_THE_HOLE_METRIC by a tad.

The problem computer game was played with this, epsilon=0.

Adding a computer-played game which is suboptimal. May diagnose.

Tweaking qSearchBreadth and epsilon again.