RACSignupDemo

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The example from the presentation Better Code for a Better World.

Our mission: create a form for the user to fill out. It should only allow submission if the form is valid. A form is valid if the user's entered a value for each field, and if the email and re-enter email fields match.

We want to minimize our statefulness for our own sanity. This means any non-essential state should be derived and driven entirely by the essential state.