Update macro to make single string instrument work with midi-poly-player.  Create single string instrument & example in comments.  Add now+ to eliminate most "late" messages.
Add documentation string for the generated stringed instruments.
Change too-generic "string" to "ektara"--a single-stringed instrument.
Merge remote-tracking branch 'origin/master' into rallen-string
Merge branch 'rallen-string' of https://github.com/rogerallen/overtone into rallen-string