title: Rails GeoIP return country/city list
body: <p>So, I'm trying to use Maxmind <strong>GeoLiteCity.dat</strong> through <strong>GeoIP</strong> gem: <a href="https://github.com/cjheath/geoip" rel="nofollow">https://github.com/cjheath/geoip</a>
  And, what bothers me: How would I possibly return the list of all countries (this is fairly easy, since there is an appropriate YAML file down there) and cities - but I don't have a clue, how to read the city list. All I know is that they are somehow stored in this <em>.dat</em> file </p>
  
  <p>Can anyone help me with this one ? Where and how should I look ?</p>