Show locations of client and servers using a local GeoIP database

using https://github.com/maxmind/geoip-api-csharp2 and a free CC-BY-SA 3.0 database with country accuracy. I also try to grab the IP for localhost from the UPnP enabled router now if Mono-NAT succeeds in finding it.

I believe this is a good indicator for people to check for trolls / identity theft.
![lobby](https://f.cloud.github.com/assets/756669/926183/b62df764-ff86-11e2-8ee3-a8c1d38b63b8.png)

as well as try to estimate if the game will lag and choose nearby opponents #2555
![serverbrowser](https://f.cloud.github.com/assets/756669/926200/f19e3cd2-ff86-11e2-9070-a8d9048c9c54.png)

I am also curious where our players from all over the world originate. :)