menu.cpp: Add the Snes9x core version from which PocketSNES is derived.
SAL: Modify SAL_RGB to return pixels in RGB 565 format, to fit with the request for RGB 565 to the Snes9x core.
sal_sound.c, main.cpp: Overhaul sound sync, part 1.
Merge branch 'audio-sync' into catsfc-import

Conflicts:
	menu/main.cpp