Add a GeoIP middleware

This commit adds a GeoIP lookup functionality to our application, implemented as a middleware. This means every request gets tagged with some geographical information inferred from its IP. I decided not to use existing IP lookups packages, as they made some assumptions about storing state in sessions.

This contains a new "geo" app, that might also be used later for storing other geographical-specific information.

added 3 commits

• 28a535c7 - Add a GeoIP middleware
• 7f37734f - Start working with Waffle feature flags
• dea8b904 - Show GeoIP information (behind a flag)

Compare with previous version

added 3 commits

• 40783e26 - Add a GeoIP middleware
• 10839b10 - Start working with Waffle feature flags
• 9ff50345 - Show GeoIP information (behind a flag)

Compare with previous version

added 3 commits

• e96d9726 - Add a GeoIP middleware
• 3a35a8b0 - Start working with Waffle feature flags
• 313aebd9 - Show GeoIP information (behind a flag)

Compare with previous version

assigned to @antoinealb

requested review from @jari

approved this merge request

merged