README.md in geonames_api-0.0.3 vs README.md in geonames_api-0.0.4

@@ -71,10 +71,15 @@
 
     > GeoNamesAPI::Country.all
     
     => ... array of GeoNamesAPI::Country instances
     
-There are no additional methods offered for countries.
+The [postal code exports](http://download.geonames.org/export/zip/) are also available for each country either in string of ruby CSV form.
+
+    # String
+    > GeoNamesAPI::Country.find("US").postal_code_export
+    # CSV::Table
+    > GeoNamesAPI::Country.find("US").postal_code_csv
 
 ### Weather
 
 The GeoNamesAPI uses the latitude and longitude of the place as the parameters for its weather service.
 
\ No newline at end of file