signup-page is a plugin that allows you to create a public signup page. A signup page is just a list of stuff
that you can sign up for, with a space next to each item where someone can sign up.
There is no validation of input, and no login is required. This is a true public signup page. However, when a
person signs up, that slot is frozen to the public (no further changes). Site admins can make changes to any slot,
at any time.