grafx - Extensible Java Graphics Package Code

Speeding the block moves back up from 210 millis to 200. It was too slow.

Making use of new ScoreReporter class. The changes should have no impact of
order of underlying calls, esp. to setScore() and setHighScore(). These are
minimally intrusive changes which make use of Score Reporter. Also now the
current score and high score pointers are exposed, as privte, in member vars.

Adding class net.blockout.production.ScoreReporter. Not using it yet.

Moving HighScoreDisplay to GameScoreDisplay, which is now an interface, and
having GameSidebar implement that. I'm in the process of refactoring some
code.

Taking care of some very minor odds and ends; improving Javadoc and removing an
import statement that was not used in LevelPlayback.

Adding quick comment to LocalBlockoutBoard which describes that certain time
intervals are currently hard-coded.

Fixing FRAMES_PAST_EOF calculation.

Removing a TODO.txt item related to finding out the exact framerate of videos
coming from GoPro camera.

In ffmpeg-overlay.sh example config file, changing fps from 29.97 to 25, from
59.94 to 50. I'm not going to pretend that I know how drop frame timecode
works.

In script '.compile-video-base.sh', allowing environment variable 'VID_FPS' to
override the default of 50. Computing FRAMES_PAST_EOF based on that.