rearrange code in cxx2as3, make some reusable
Added SN76489.h
Added as3 Makefile
as3: Added SN76489 + some cleanups
cxx2as3 & cxx2js: move common code into ecma.h + a bunch of improvements for cxx2as3
reflow C6280.h
Add a couple of Sonic SMS tunes
vgmplay: support SN76489
QSound cleanups, some compat cleanups