Merge branch 'master' into fix_ticket_561

cfg/encoder_lowdelay_P_vtm.cfg

cfg/encoder_lowdelay_vtm.cfg

cfg/encoder_randomaccess_vtm.cfg

doc/software-manual.tex

source/App/DecoderApp/DecApp.cpp

source/App/EncoderApp/EncApp.cpp

source/App/EncoderApp/EncAppCfg.cpp

source/App/EncoderApp/EncAppCfg.h

source/Lib/CommonLib/Buffer.h

source/Lib/CommonLib/InterPrediction.cpp

source/Lib/CommonLib/Picture.h

source/Lib/CommonLib/QuantRDOQ.cpp

source/Lib/CommonLib/Slice.cpp

source/Lib/CommonLib/TypeDef.h

source/Lib/CommonLib/UnitTools.cpp

source/Lib/CommonLib/UnitTools.h

source/Lib/DecoderLib/CABACReader.cpp

source/Lib/DecoderLib/DecLib.cpp

source/Lib/DecoderLib/VLCReader.cpp

source/Lib/EncoderLib/CABACWriter.cpp