Port Catznip's Chat Alerts feature. Ever wonderful Kitty code!

indra/llui/lltextbase.cpp

indra/llui/lltextbase.h

indra/llui/lltextparser.cpp

indra/llui/lltextparser.h

indra/newview/CMakeLists.txt

indra/newview/app_settings/settings_alchemy.xml

indra/newview/llchathistory.cpp

indra/newview/llchathistory.h

indra/newview/llchatitemscontainerctrl.cpp

indra/newview/llchatitemscontainerctrl.h

indra/newview/llfloaterchatalerts.cpp

indra/newview/llfloaterchatalerts.h

indra/newview/llfloaterimsession.cpp

indra/newview/llstartup.cpp

indra/newview/lltoastimpanel.cpp

indra/newview/llviewerfloaterreg.cpp

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

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

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

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