GeoIP lookups for issue #92
Round to the appropriate precision
Address Hanno's commentary

The cruel words from such an illustrious man have riven my heart.

Remove the inadvertent stub of a GeoIPTestCase class that was never meant to
be.  Actually call the teardown method for GeoIPIsolation.
Merge pull request #141 from rtilder/master

GeoIP lookups for issue #92