Add geolocations back in

[alexanderkoller]

The GIVE Matchmaker had a geolocation service for the IP addresses. This was a lot of fun, and we should add it back in. The new version of the service we used for GIVE is here: https://github.com/maxmind/GeoIP2-java

[akoehn]

The problem here is that the IP needs to be forwarded from the Minecraft server to the broker; currently, we store the IP of the Minecraft server itself, which is pretty pointless.

[ca-schaefer]

Now, the MinecraftClient sends the player IP address with port number to the broker when a new player logs in (as GameData.ClientAddress):
/127.0.0.1:50666