Merge branch 'Branch_HRD' into 'master'

source/Lib/CommonLib/HRD.cpp

source/Lib/CommonLib/HRD.h

source/Lib/CommonLib/Slice.cpp

source/Lib/CommonLib/Slice.h

source/Lib/CommonLib/TypeDef.h

source/Lib/DecoderLib/VLCReader.cpp

source/Lib/DecoderLib/VLCReader.h

source/Lib/EncoderLib/EncGOP.cpp

source/Lib/EncoderLib/EncHRD.cpp

source/Lib/EncoderLib/EncLib.cpp

source/Lib/EncoderLib/RateCtrl.cpp

source/Lib/EncoderLib/RateCtrl.h

source/Lib/EncoderLib/VLCWriter.cpp

source/Lib/EncoderLib/VLCWriter.h