GeoIP submodule

For dev it's easy
GeoIPv2 is now a core plugin
Improve Gruntfile
Clean files in geoip plugin
Update GeoIP README
Update dependencies files

* Don't include version to avoid mismatches.
* Include all deps needed.
Grunt Tasks more and more
Repercute Grunt changes
Reflect Grunt changes #.2
Annnnnd JS task!

The last, I'm tired.