This is a relative explicit import. So it always does the right thing, but it's nice in that if we take this app out and turn it into a library, we won't have to do anything fancy here.

We definitely want to avoid relative implicit imports like the plague because they do who-knows-what depending on the context.

We might have a thing against this, but I'd be ok with relative explicit imports and it's considered a good practice in Django because it makes it easier to move apps around.