Update to February GeoIP database
Please review my branch [geoip-feb2013](https://gitweb.torproject.org/karsten/tor.git/shortlog/refs/heads/geoip-feb2013) and merge it into maint-0.2.2 and subsequent maintained branches.
Also, please merge my branch [geoip-manual-update](https://gitweb.torproject.org/karsten/tor.git/shortlog/refs/heads/geoip-manual-update) into master. MaxMind took out an erroneous assignment range in their latest database, so we don't have to correct that anymore. There's a comment in that file saying this, so not worth a ChangeLog entry, IMO.
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