merge changes for other open sourc contributions

README.md

doc/contributions.txt

indra/linux_crash_logger/linux_crash_logger.cpp

indra/llcommon/llerror.h

indra/llmath/llcalcparser.h

indra/llui/llkeywords.cpp

indra/llui/lltextbase.cpp

indra/llui/lltextbase.h

indra/llui/lltexteditor.cpp

indra/llui/lltexteditor.h

indra/llui/llurlaction.cpp

indra/mac_crash_logger/mac_crash_logger.cpp

indra/newview/llnetmap.cpp

indra/newview/llpanelprofile.cpp

indra/newview/llviewermenu.cpp

indra/newview/skins/default/xui/en/notifications.xml

...ewview/skins/default/xui/en/panel_preferences_general.xml