Update to freegeoip 3.0.4

Update to freegeoip 3.0.4

Update version and copyright

Set v3.0.2 and add -version command line flag

Set v3.0.2 and add -version command line flag

Harmonizing output formats

This adds the IP address to the first column of the CSV output.

Closes fiorix#85.

Fix docker command

Suppress DNS lookups for invalid hostnames

Major refactor of the Go server

Code review and enhancements