Merge branch 'ilrp' into 'master'

cfg/multi-layer/encoder_lowdelay_vtm_l1.cfg

cfg/multi-layer/layer1_gop16_randomaccess.cfg

cfg/multi-layer/layer1_gop_lowdelay.cfg

cfg/multi-layer/layer1_gop_lowdelay_P.cfg

cfg/multi-layer/layer1_gop_randomaccess.cfg

cfg/multi-layer/two_layers.cfg

cfg/multi-layer/two_layers_scalable.cfg

doc/software-manual.tex

source/App/EncoderApp/EncApp.cpp

source/App/EncoderApp/EncAppCfg.cpp

source/App/EncoderApp/EncAppCfg.h

source/Lib/EncoderLib/EncCfg.h

source/Lib/EncoderLib/EncGOP.cpp

source/Lib/EncoderLib/EncLib.cpp