Merge branch 'DRTVWR-559' of https://github.com/secondlife/viewer into cronchy

indra/llaudio/llaudiodecodemgr.cpp

indra/llcommon/llqueuedthread.cpp

indra/llcommon/workqueue.cpp

indra/llcommon/workqueue.h

indra/llimage/llimageworker.cpp

indra/llrender/llimagegl.h

indra/llwindow/llwindowwin32.cpp

indra/newview/llappviewer.cpp

indra/newview/lldrawpoolalpha.cpp

indra/newview/llfloaterperformance.cpp

indra/newview/llperfstats.cpp

indra/newview/llperfstats.h

indra/newview/llviewerstats.cpp

indra/newview/llvoavatar.cpp

indra/newview/llvoavatar.h

indra/newview/llworld.cpp

indra/newview/pipeline.cpp

indra/newview/pipeline.h