Added 8*8, 16*8 and 16*16 multiplication routines.

Conflicts:
	src/00/math.asm
Added 8*8, 16*8 and 16*16 multiplication routines.
Forgot to return
Fixed a screwup
Merge pull request #120 from Vijfhoek/upstream

Added 8*8, 16*8 and 16*16 multiplication routines.