* Add a world cities database with type-ahead search on the Member Directory.
* Users can search for a known city to order users by distance from that city
rather than from their own configured location on their settings page.
* Users must opt-in their own location before this feature may be used, in order
to increase adoption of the location feature and to enforce fairness.
* The `nonshy setup locations` command can import the world cities database.
The photo upload limit for user profiles is raised from 24 to 100.
The bug about Filesize not saving to the database for Photos and
CommentPhotos (storing zeroes in the DB) has been fixed. Run the
`nonshy backfill filesizes` to populate your existing database.
