JVET-Q0814: DPB requirements as for a single layer

source/App/DecoderApp/DecApp.cpp

source/App/DecoderApp/DecApp.h

source/App/DecoderApp/DecAppCfg.cpp

source/App/DecoderApp/DecAppCfg.h

source/App/EncoderApp/EncApp.cpp

source/App/EncoderApp/EncAppCfg.cpp

source/App/EncoderApp/EncAppCfg.h

source/Lib/CommonLib/Slice.cpp

source/Lib/CommonLib/Slice.h

source/Lib/CommonLib/TypeDef.h

source/Lib/DecoderLib/DecLib.cpp

source/Lib/DecoderLib/DecLib.h

source/Lib/DecoderLib/VLCReader.cpp

source/Lib/EncoderLib/EncCfg.h

source/Lib/EncoderLib/EncLib.cpp

source/Lib/EncoderLib/EncLib.h

source/Lib/EncoderLib/EncLibCommon.h

source/Lib/EncoderLib/VLCWriter.cpp