Fix released for existing creations going missing

A user from Turkey reported that his creations (specifically, heraldry) were missing. I checked into it, and turns out the last server reset revealed a bug in how I was handling caching.

That bug is now squashed. Heraldry, regions, and cultures that seemed to be missing are now back.

There are still some other bugs that cause errors in region and culture generation. If you see a server error page, that's probably why. Just try again for now.