Actually, I think I was mistaken :( If the app doesn't reference a model during startup, then AR::Base won't be defined at this point, even if it might be defined later. So we should really put this in the `#setup` method (after the call to `command.setup`), and make sure that it doesn't matter if we end up calling `disconnect!` more than once. Sound okay? Feel free to just commit the code when you are happy.