Revert "Don't show any images until the user generates a new one"

Revert "Don't show any images until the user generates a new one"

This reverts commit 94706668717da57af5def7f4153e35baa434224c.

This behavior had some negative side effects. Most notably, it meant
that when reloading the website a user would see nothing until
generating a new image, (perhaps doing so for no other reason than to
see the history).

Another problem was that a spectator, (like Carl or Stacy), couldn't
silently watch along, but had to also create an image.

Meanwhile, the intent of this behavior was just to ensure each of the
boys saw a blank history on their first encounter with the web
site. Now that at least 3 boys have seen the site, there's not much
remaining need for this.