(I put this as enhancement because it's not absolutely necessary, but it is something I would very much like to be in place before launch.)

I'd like a column in the database (craters table) that lists the time at which the page loads.  This will, along with a filled in project_id, let me determine not only if Man vs. Machine is more or less accurate than Simply Craters, but also whether it's faster.  That's really what we want from it as really the root of the issue - to be faster - so this is an important analysis to be done.

A way I could fake it if this would be way too much work is to look at the last-done image submit time, and if it's less than like 30 minutes, to say that's when the new one was loaded.  It's imperfect and a hack, but I'll do it if that's the only option.