Supercollier and dependencies

Mainly intended as a proof of concept / experiment if it's possible to use supercollider from within non-x emacs on sailfish OS on my Gemini PDA.

(Won't make a lot of sense on keyboard-less devices, imho.)

(Not sure if it will make any sense at all. This is mostly for fun ;) )

I'll wildly mix dependencies from build.merproject.org as well as openrepos, in order to make it run as quickly as possible. Cleanup might follow later if (!) I think it's usable and can be bothered to do it.