add some MIDI files, we're going to play MIDI to Adlib
midi decoding, yay
well, ok, it makes noise
yay, it sort of plinks out the music on key!
fixed sysex parsing
doh, choose by MIDI channel
MIDI events with delay == 0 must be parsed in one go. Also handle Note
On events with zero velocity as Note Off (an ugly MIDI quirk,
apparently).
remove key on rekey hack
disable debug statements again
comment out debug again. apply tempo change to all tracks (because
format 0 applies it to all, and format 1 likes to put the tempo change
in the first track and expect it to apply to all).