Merge tag '6.6.2-release' of https://github.com/secondlife/viewer into heimdall

indra/llmath/CMakeLists.txt

indra/llmath/llvolume.cpp

indra/llmath/llvolume.h

indra/llmeshoptimizer/llmeshoptimizer.cpp

indra/llmeshoptimizer/llmeshoptimizer.h

indra/llprimitive/lldaeloader.cpp

indra/llprimitive/llmodel.cpp

indra/llprimitive/llmodel.h

indra/llui/llbutton.cpp

indra/llui/llbutton.h

indra/llui/llprogressbar.cpp

indra/llui/llspinctrl.cpp

indra/newview/VIEWER_VERSION.txt

indra/newview/llappviewer.cpp

indra/newview/llconversationview.cpp

indra/newview/llfloaterimsessiontab.cpp

indra/newview/llfloatermodelpreview.cpp

indra/newview/llfloatertools.cpp

indra/newview/llfloaterworldmap.cpp

indra/newview/llfloaterworldmap.h