This is a simple test app I wrote to try looking up city, state and county information
based on zip code entry. Basically, when you are editing a contact, type in the zip and
the site will do an AJAX lookup and auto-fill the city, state and county.



Make sure that the zipcode database is populated using the .dump file in the db folder first.
  $ rake db:migrate
  $ zcat db/zipcodes.dump.gz | sqlite3 db/development.sqlite3