Merge branch 'sign_pred_mem_reduction' into 'master'

source/Lib/CommonLib/Buffer.cpp

source/Lib/CommonLib/CodingStructure.cpp

source/Lib/CommonLib/CodingStructure.h

source/Lib/CommonLib/Common.h

source/Lib/CommonLib/DepQuant.cpp

source/Lib/CommonLib/DepQuant.h

source/Lib/CommonLib/Reshape.h

source/Lib/CommonLib/TrQuant.cpp

source/Lib/CommonLib/TrQuant.h

source/Lib/CommonLib/TypeDef.h

source/Lib/CommonLib/Unit.cpp

source/Lib/CommonLib/Unit.h

source/Lib/CommonLib/UnitTools.cpp

source/Lib/CommonLib/UnitTools.h

source/Lib/CommonLib/x86/InitX86.cpp

source/Lib/CommonLib/x86/TrQuantX86.h

source/Lib/DecoderLib/CABACReader.cpp

source/Lib/DecoderLib/CABACReader.h

source/Lib/EncoderLib/CABACWriter.cpp

source/Lib/EncoderLib/EncModeCtrl.cpp