Add support for viewer-side baking

indra/llappearance/llavatarappearance.cpp

indra/llappearance/llavatarappearance.h

indra/llappearance/lldriverparam.cpp

indra/llappearance/lldriverparam.h

indra/llappearance/llpolymorph.cpp

indra/llappearance/llpolyskeletaldistortion.cpp

indra/llappearance/lltexglobalcolor.cpp

indra/llappearance/lltexglobalcolor.h

indra/llappearance/lltexlayer.cpp

indra/llappearance/lltexlayer.h

indra/llappearance/lltexlayerparams.cpp

indra/llappearance/lltexlayerparams.h

indra/llappearance/llviewervisualparam.cpp

indra/llappearance/llwearable.cpp

indra/llappearance/llwearable.h

indra/llcharacter/llcharacter.cpp

indra/llcharacter/llcharacter.h

indra/llcharacter/llvisualparam.cpp

indra/llcharacter/llvisualparam.h

indra/newview/CMakeLists.txt