Use symbols in controller tests instead of strings and expand the 'new' test in user_controller_spec
Set up a form for the sign up page
Give form fields more space
Create action for the form button works, but it still accepts empty data
Add create.html.erb (forgotten in the last commit).
Form states errors and highlights where these are made.
Successful creating a new user redirects to the user's profile.
A flash message appears in the user profile when redirected after
the successful creation of the account.
Integration test for user form validates a success and a failure sign up.