Added controller for User model.  Fixed page for listing the users.
The forms are not rendering for adding and editing users.
Added a StaticPages controller and a home pages and updated the routes
to make the root the new home page.
Added functionality for the signup page so a user can be added.
Added functionality for a user to log in & out.  Also to sign up and
be logged in.  Added a remember_token cookie to the database for a
user to track the session.