merge changes for 5.0.0-release

.hgtags

doc/contributions.txt

indra/llappearance/llavatarappearance.cpp

indra/llappearance/llavatarappearance.h

indra/llappearance/llavatarjoint.cpp

indra/llappearance/llavatarjointmesh.cpp

indra/llappearance/lldriverparam.cpp

indra/llappearance/lldriverparam.h

indra/llappearance/llpolymorph.cpp

indra/llappearance/llpolymorph.h

indra/llappearance/llpolyskeletaldistortion.cpp

indra/llappearance/llwearable.cpp

indra/llcharacter/CMakeLists.txt

indra/llcharacter/llbvhloader.cpp

indra/llcharacter/llbvhloader.h

indra/llcharacter/lleditingmotion.cpp

indra/llcharacter/llheadrotmotion.cpp

indra/llcharacter/llheadrotmotion.h

indra/llcharacter/lljoint.cpp

indra/llcharacter/lljoint.h