QAR-377 maintenance-6 merge:

doc/contributions.txt

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

indra/llcommon/llerror.cpp

indra/llcommon/llstreamtools.cpp

indra/llcommon/llstreamtools.h

indra/llinventory/llinventory.cpp

indra/llinventory/llparcelflags.h

indra/llmessage/llnamevalue.cpp

indra/llmessage/llnamevalue.h

indra/llmessage/llregionflags.h

indra/mac_updater/mac_updater.cpp

indra/newview/app_settings/keywords.ini

indra/newview/llappviewer.cpp

indra/newview/llappviewer.h

indra/newview/lldelayedgestureerror.cpp

indra/newview/lldelayedgestureerror.h

indra/newview/llfloaterabout.cpp

indra/newview/llfloaterregioninfo.cpp

indra/newview/llgesturemgr.cpp

indra/newview/llimview.cpp