Initial mt_invert asm reimplementation
Better mt_invert asm
Remove unaligned sse2 version of mt_invert

It didn't work and it's slower than pure C version anyway. Do we
actually need aligned sse2?
Fix broken asm detection

Regression in 5ec787d0a5c5f148fb9473c2a5112641a5a08b24
Rewrite mt_binarize asm
Remove useless asm files
Fix compilation with ICL, optimize mt_binarize for mod32

Add prefetch and second asm thread. This yields the same or a bit better
performance than the old binarize.
Move some stuff in mt_binarize to macro
Rewrite mt_logic asm
Rewrite mt_adddiff asm
Rewrite mt_makediff asm
Rewrite mt_average asm
Fix broken asm on non-mod16/32 clips
Rewrite mt_clamp asm

vc110 seems to do dumb things so it's actually a bit slower than the
original one. Better with ICL as always.
Optimize memset_c and copy_c a bit

Use only one call to memset/memcpy in common case when pitch == width
Rewrite mt_motion asm
Move ugly _mm_set1_epi32 to a function
Remove motionmask.asm

Also fix misleading variable name in mask_sse2_op (wMod32 -> wMod16)
Rewrite mt_merge(luma=false) asm
Rewrite mt_merge(luma=true) asm