Add a region trackery floatery thing

indra/newview/CMakeLists.txt

indra/newview/alfloaterregiontracker.cpp

indra/newview/alfloaterregiontracker.h

indra/newview/app_settings/commands.xml

indra/newview/llfloaterworldmap.cpp

indra/newview/llfloaterworldmap.h

indra/newview/llviewerfloaterreg.cpp

indra/newview/llworldmap.cpp

indra/newview/llworldmap.h

...a/newview/skins/default/xui/en/floater_region_tracker.xml

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

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

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