Update api.php

Removed http://ipv4.ipogre.com from the list, as it no longer gives you a plain IP.
installation update
remove test ip
Merge pull request #7 from mickrip/patch-2

Removed http://ipv4.ipogre.com from the list, as it no longer gives you a plain IP.
Unit tests for external ip
update travis script from wp-cli
Update for Travis
ignore 2 tests in travis
now really skip
Merge branch 'master' into geoipv2