TEncSearch: fix for gcc warning
Bidir ME: store bits required for bidir which will be used for merge estimation
TEncSearch: remove unused code
Replace sad_48 vector class function with intrinsic.
Replace sad_64 vector class function with intrinsic.
Replace sad_x3_48 vector class function with intrinsic.
Replace sad_x3_64 vector class function with intrinsic.
Replace sad_x4_48 vector class function with intrinsic.
Replace sad_x4_64 vector class function with intrinsic.
pixel: move SSE4.1 functions from pixel8.inc to pixel-sse41.cpp
replace block_copy_p_p vector class function with intrinsic code.
Performance is almost same as that of vector function.
replace block_copy_p_s (short to pixel) vector class function with intrinsic.
Performance measured is same as that of vector function.
replace blockcopy_s_p (pixel to short) vector class function with intrinsic.
Performance is same as that of vector class function.
replace "pixelsub_sp" vector class function with intrinsic.
Performance is same as that of vector function.
Replace "pixeladd_ss" vector class function with intrinsic.
Performance measured is same as that of vector function.