Merge branch 'master' 6.4.8 into DRTVWR-497

autobuild.xml

doc/contributions.txt

indra/cmake/Copy3rdPartyLibs.cmake

indra/llcommon/llapr.cpp

indra/llcommon/llapr.h

indra/llcommon/llsdutil.cpp

indra/llcommon/llsdutil.h

indra/llcommon/llstl.h

indra/llcommon/llthreadsafequeue.h

indra/llkdu/include_kdu_xxxx.h

indra/llkdu/tests/llimagej2ckdu_test.cpp

indra/llmessage/llassetstorage.cpp

indra/llmessage/llextendedstatus.h

indra/llmessage/lltransfertargetvfile.cpp

indra/llmessage/llxfer.cpp

indra/llmessage/llxfer_mem.cpp

indra/llrender/llgl.cpp

indra/llui/llrngwriter.cpp

indra/llui/lluictrlfactory.h

indra/llui/llview.cpp