Changes

* GeoNames data is primarily intended for present day usage. It contains little historical information. I have heard that it is pretty complete for United States, Canada, and less so for Europe, although it seems to have all the European cities I have tested so far. If you find an error or omission in the GeoNames data, you may want to tell GeoNames about it [http://www.geonames.org/manual.html| http://www.geonames.org/manual.html].