Port TG musical instruments here

[mbc]

hello i would like to clarify :

We don't like to use code or sprites directly from other codebases. hOWEVER, this doesn't mean we can't implement something just because another server did it first. good ideas are good ideas - don't directly rip any part of their project (make your own menu layouts etc) and we are fine.

i think programmable instruments is a fun idea. i am suggesting it for a community patch because i don't like making HTML/CSS interfaces.