Removed log-in requirement for aggregate data. Fixed a bug where GeoIP lookup failure would cause null values to be written to fields that are not allowed to be null.

No longer requires login to see total visits by country, domain, etc. Still requires log-in to see detailed stats, like those which map a domain to an action.

Also, fixed a bug where if the GeoIP lookup failed, the lat/long would be set to null and the DB would complain when you tried saving the NetInfo object.