merge changes for 3.6.3-release

.hgtags

doc/contributions.txt

indra/cmake/LLAddBuildTest.cmake

indra/llimage/llimage.cpp

indra/llimage/llimage.h

indra/llmath/llcamera.cpp

indra/llmath/llcamera.h

indra/llmessage/llcurl.cpp

indra/llprimitive/llmodel.cpp

indra/llrender/llgl.cpp

indra/llrender/llgl.h

indra/llrender/llimagegl.cpp

indra/llrender/llrendertarget.cpp

indra/llui/llscrolllistcolumn.cpp

indra/llui/llscrolllistctrl.cpp

indra/llui/llscrolllistctrl.h

indra/lscript/lscript_compile/indra.l

indra/newview/VIEWER_VERSION.txt

indra/newview/app_settings/keywords.ini

indra/newview/app_settings/settings.xml