added TODO file, partway through implementing sustain pedal
oo impl has basic functionality, no shift yet
oo impl - range shift seems to work
oo impl - shift works, display works, no pedal yet
Sustain pedal partially tested, refuses to sound more than eight notes
fixed 8-note limit, new problems with key-pedal-shift-samekey-releasepedal
updated README
new oo impl, includes spacebar-pedal