Milestone 1: FULL IMPLEMENTATION OF MIXER, API FUNCTIONS, WIDGETS, CHANNELS

	[DONE] documentation fixes (channel, OX_CLASS::describe, what happens for note
		events vs. continuous controller changes)
	full mixer control (amp/pan, stereo, etc) and GUI elements for it
	fix bug when effect has no inputs.. i.e. have a silence buffer for inputs
	new MX_COPY/MX_THRU opcodes in mixer
	full stereo in mixer
	separate owning_buffer from ref'd_buffer (output only)
	[DONE] current parameter recording mechanism	
	[DONE] discussed API changes	

Milestone 2: FULL IMPLEMENTATION OF SEQUENCER, PATTERN SYSTEM, WAVETABLE/INSTRUMENTS

	better example machine + docs
	widget leak analysis
	machine type list (color coding)?
	ADSR controls? 
	timing/sequencer math + event/pattern

Milestone 3: FILE FORMAT, BUILD SYSTEM, MIDI CONTROL, FINAL POLISHING
	wavemap editor
	arrangement component
