Add city and country data to logs.

[lingster]

see: aschn/drf-tracking#136

[anatolzak]

created this pull request where city and country data are added to logs #38

[anatolzak]

From Django Geolocation with GeoIP2

Instructions on how to enable location logging

In order to perform IP-based geolocation, the GeoIP2 object requires the GeoIP Country and/or City datasets in binary format (the CSV files will not work!). Grab the GeoLite2-Country.mmdb.gz and GeoLite2-City.mmdb.gz files and unzip them in a directory corresponding to the GEOIP_PATH setting.