TODO:

* Conductor needs to have a way to support chords containing notes of different lengths

This will probably get very nasty, since it involves rooting around in the guts
of MIDI::Simple.  Not really a high priority, but it would be nice.

* Conductor needs phrase renderer support
* Add supported event type check to Conductor.pm during render
* Use Hook::LexWrap to install "Autorules" for Bars - effectively making
  themselves self-regulating
* Test, test, test!  t/* lacks.  :-\ 
* Re-add Gene's phrase similarity code.
* Noop support for twidding other MIDI params like modulation and pitch bend
