app/views/layouts/application.html.erb
Adding code for a pretty debug box, including a Sass mixin
Agregando el recurso Users a las rutas
creando la acctión show
creando la vista para show
Adding Factory Girl to the Gemfile
Adding Factory Girl to the Gemfile
A factory to simulate User model objects
A test for the user show page
 Adding a title and heading for the user profile page
Redefining the Bcrypt cost factor in a test environment
The user show view with name and Gravatar
Defining a gravatar_for helper method
Adding a sidebar to the user show view.
 SCSS for styling the user show page, including the sidebar.
Good basic tests for signing up users
A form to sign up new users
CSS for the signup form
Adding an @user variable to the new action.
 A create action that can handle signup failure (but not success)