merge changes for storm-832

.hgtags

doc/contributions.txt

etc/message.xml

indra/cmake/Boost.cmake

indra/integration_tests/llui_libtest/llui_libtest.cpp

indra/linux_updater/linux_updater.cpp

indra/llaudio/llaudioengine.cpp

indra/llcommon/llavatarname.cpp

indra/llcommon/llavatarname.h

indra/llcommon/llfile.cpp

indra/llcommon/llfile.h

indra/llimage/llpngwrapper.cpp

indra/llimage/llpngwrapper.h

indra/llmessage/llavatarnamecache.cpp

indra/llmessage/llavatarnamecache.h

indra/llui/llnotifications.cpp

indra/llvfs/CMakeLists.txt

indra/llvfs/lldir.cpp

indra/llvfs/lldir.h

indra/llvfs/lldir_linux.cpp