Don't expose pretty launch page to authenticated users

(I suspect you wanted this to view things as an admin, but if that's the case we should add it to an admin-only route!)
Actually, it's pretty much on purpose, even though it's a bit of a placeholder right now. 

Once we go live, the launch page will basically disappear/be replaced by this page, which uses a different layout & structure to the launch page, and provides easy links to viewing the public-facing pages (blog, help, about, etc) so users will be able to read and access lots of information before making an account—if they want to. So it would act as an intro page for new users, and as an easy way for existing users to sign in and access their accounts. If a user is already signed in, the automatic homepage is their dashboard, but the homepage isn't really private information.

...I think we need a home page, dude.