2010-04-13: v4.0.5
* kiko + old fonts: make K less similar to H. regrettable, as i think
they looked better before, but they were just too similar.
* noise instrument: add “S CMD” setting. “FREE” keeps classic S command
behavior. “STABLE” prevents the noise generator from switching between 7-bit and 15-bit LFSR, as it occasionally mutes the sound.
adjust the setting to suit your personality.
* rewrite possibly buggy groove manipulation code.
* remove valid data assert when drawing groove screen.