handle text event metaevent
midi now prints individual note events
Merge branch 'master' into midi_input
handle use of zero-velocity for note end
Merge branch 'master' into midi_input
Merge branch 'master' into midi_input

Conflicts:
	sebastian/midi/midi.py
stub for MIDI handler
moved to handler pattern
base handler
fixed handlers
fixed bad handling of note end
Merge remote-tracking branch 'origin/master' into midi_input
create list of OSequence from MIDI
Merge branch 'master' into midi_input
Merge branch 'midi_input' fixes #3