grafx - Extensible Java Graphics Package Code

Removing external class SubUpdatable as promised.

Committing external class SubUpdatable. The intention is to immediately remove
this class thereafter. Saving it in case I need to resurrect it later.

Adding inner protected static class SubUpdatable to CanvasSplitter so that code
would not have to be repeated. Not using this yet. Other changes are minor;
changing some local variables to final, changing signatures of some methods
from 'public' to 'protected'.

Moving the watermark down just a tad.

Increasing size of watermark font just a hair.

Changing DEFAULT_VID_FPS from 50 to 60. This seems to synch up better with
typical refresh rates. I don't know about Europe.

Adding file 'excellent-complex.blo'.

Adding file 'excellent-simple.blo'.

Removing all BLO files from data/ dir.

Upping the number of layers to clear on level 26, by one layer.