Move database logging to localsettings

* Makes it easier to be optional
* Easier to turn off and on without effecting version control
Normalize location data from github actors

* added location model and admin
Added initial nominatim code

* Uses admin email for user-agent
* See: http://wiki.openstreetmap.org/wiki/Nominatim
Merge pull request #2 from davidfischer/nominatim

Initial location code