Merge from default branch

doc/contributions.txt

indra/llcharacter/llkeyframewalkmotion.cpp

indra/llcharacter/llkeyframewalkmotion.h

indra/llimage/llimagepng.cpp

indra/llimage/llimagepng.h

indra/llmath/tests/mathmisc_test.cpp

indra/media_plugins/gstreamer010/CMakeLists.txt

indra/media_plugins/webkit/media_plugin_webkit.cpp

indra/newview/app_settings/settings.xml

indra/newview/llagentcamera.cpp

indra/newview/llagentcamera.h

indra/newview/llappearancemgr.cpp

indra/newview/llassetuploadresponders.cpp

indra/newview/llassetuploadresponders.h

indra/newview/llfloateranimpreview.cpp

indra/newview/llfloaternamedesc.cpp

indra/newview/llfloatersnapshot.cpp

indra/newview/llfloatersnapshot.h

indra/newview/llfolderview.cpp

indra/newview/llfolderview.h