Merge branch 'master' v 6.6.1 into DRTVWR-528

.gitignore

autobuild.xml

build.sh

doc/contributions.txt

indra/CMakeLists.txt

indra/cmake/CMakeLists.txt

indra/cmake/Copy3rdPartyLibs.cmake

indra/cmake/GLOD.cmake

indra/cmake/LLCommon.cmake

indra/cmake/LLMeshOptimizer.cmake

indra/cmake/MESHOPTIMIZER.cmake

indra/cmake/Tracy.cmake

indra/edit-me-to-trigger-new-build.txt

indra/lib/python/indra/util/llmanifest.py

indra/llappearance/llavatarappearance.cpp

indra/llappearance/lldriverparam.h

indra/llappearance/llpolymorph.cpp

indra/llappearance/llpolymorph.h

indra/llappearance/llpolyskeletaldistortion.cpp

indra/llappearance/llpolyskeletaldistortion.h