v3.0

New version of the freegeoip web server.

Changes:

• Configuration file is gone. All switches are in the command line now.
• The updatedb script is gone. Now the server does some background job
  to download and maintain the database file up to date.
• Auto-reload of the database. If you update or overwrite the database
  file the server reloads it automatically with no service interruption.
• Single file front-end. No longer serving any JS or CSS, using it all
  from the cloud. jQuery is gone and the front-end is based on AngularJS
  and Bootstrap only.
• No more DNS contention. If you're running your own server and need
  that then use something external, like dnsmasq.
• Database date is exposed to clients in the X-Database-Date header.
• Preliminary IPv6 support. Closes #21.
• Localized country, region and city names. The server uses the
  Accept-Language header to determine the language of the response.
• Official docker support. See the Dockerfile for details.
• New package freegeoip for Go. All the above and more tidbits in a Go
  package that other programs can leverage.

This version of the freegeoip web server is backwards compatible with
the previous version. The HTTP API is virtually the same.