Merge pull request #159 from cxd4/master

repair MulMatricesC with auto-vectorizable algorithm, remove SSE-fixed c...
Update 3d math code in Glide64mk2 too
Can get rid of 'NOSSE' define
(Glide2GL) Fixes the regression in Glide64 in PilotWings64 where the
clipped window portions of the screen display all sorts of colors
instead of just being black
Fix rdp_fillrect regression - Mario Kart 64 'fill rectangle' parts
were not all-black at start of race
fix segfault in wrong `pitchindwords' formula