cli: fix missing reference to superfast preset
improvement TEncBinCABAC::encodeBin by temporary variant and reduce AND operator
improvement TEncBinCABAC::writeOut by mask operator and local variant
reduce g_minInGroup from uint32_t to uint8_t
optimize: replace g_groupIdx[] by getGroupIdx()
improvement by replace SHIFT to MASK_AND
faster sign(X) and N^2 on TComTrQuant::xRateDistOptQuant
cleanup on TComTrQuant::getTUEntropyCodingParameters