merge changes for vwr-24347

.hgtags

build.sh

doc/contributions.txt

etc/message.xml

indra/cmake/GetPrerequisites_2_8.cmake

indra/cmake/LLAddBuildTest.cmake

indra/llaudio/llaudioengine.cpp

indra/llcommon/llavatarname.cpp

indra/llcommon/llavatarname.h

indra/llcommon/llfile.cpp

indra/llcommon/llfile.h

indra/llcommon/llversionviewer.h

indra/llimage/llpngwrapper.cpp

indra/llimage/llpngwrapper.h

indra/llmath/llbbox.cpp

indra/llmath/llbbox.h

indra/llmath/tests/m3math_test.cpp

indra/llmessage/llavatarnamecache.cpp

indra/llmessage/llavatarnamecache.h

indra/llmessage/llcircuit.cpp