Without adding "Rails.root.join(...)" (or something else returning a complete path to the countries.xml file) this error occurred:
"No such file or directory @ rb_sysopen - config/countries.xml"
I think it happened because it could not find that file through a relative path.
Storing the countries in the database is overkill, so just use a
copy of the geonames countryInfo data that is loaded into a hash
the first time it is used.
