Keen Modding Live - Level info page

I've recently continued fleshing out the Keen Modding Live level information page. It now shows the level's name, author, description, creation time, episode, and zone. If the current user owns the level, a "delete level" link appears that, unsurprisingly, deletes the level. Administrators have a link that sets the level's owner to the ID Software pseudo-user. I plan to use that to upload the original levels while making it clear that they're not mine. While testing, I noticed that the delete-level API endpoint is broken: it did not in fact delete the level. There was an issue with foreign key dependencies in the database; setting the level's current version ID to null before cascade-deleting it and the level versions fixed the problem.