asm : remove chroma_p2s_i444, can be replaced by luma_p2s
test bench : Modify chroma_p2s test function to handle csp.
residual coding unit is always square
TEncEntropy: fix gcc warnings
tencsao: remove unused calcSaoStatsBlock
tencsao: new and delete replaced with  X265_MALLOC and X265_FREE
tencsao: Pel replaced with pixel type
tcomsaq: remove unused get and set saolcuboundary methods
tcomsao: use X265_MALLOC and X265_FREE in create() and Pel replaced with pixel
tcomsao: replaced All Pel type into pixel type
tcomsao: only get method is unused, set lcuboundary is required

references 742641e0f796
vbv: bug fixes in --no-cutree flow. Ignore intracosts in calculating satdcost per cu.

--HG--
branch : stable
Merge with stable
cmake: detect strtok_r, use workaround when not present