Merge branch 'O0057-AltHpelIf' into 'master'

source/App/EncoderApp/EncAppCfg.cpp

source/Lib/CommonLib/ContextModelling.cpp

source/Lib/CommonLib/ContextModelling.h

source/Lib/CommonLib/Contexts.cpp

source/Lib/CommonLib/InterPrediction.cpp

source/Lib/CommonLib/InterpolationFilter.cpp

source/Lib/CommonLib/InterpolationFilter.h

source/Lib/CommonLib/MotionInfo.h

source/Lib/CommonLib/Mv.cpp

source/Lib/CommonLib/Mv.h

source/Lib/CommonLib/TypeDef.h

source/Lib/CommonLib/UnitTools.cpp

source/Lib/DecoderLib/CABACReader.cpp

source/Lib/EncoderLib/CABACWriter.cpp

source/Lib/EncoderLib/EncCu.cpp

source/Lib/EncoderLib/EncCu.h

source/Lib/EncoderLib/EncModeCtrl.cpp

source/Lib/EncoderLib/InterSearch.cpp

source/Lib/EncoderLib/InterSearch.h