Adding users

Basic feature test to get back into the TDD cycle - I just want to be prompted by the test 'Hey, there's no such thing as a 'Sign Up' clickable! Wat do!?' and then go from there.

And then I cleaned up the look up the README. At the top is all the functionality of the current app.  In order of importance (from my current perspective), comes the rest of the functionality I would like to implement.

Tests are failing, according to the emails! Duh!