Add some degbug information to the site layout
Create the show.html.erb for showing a user and add stub for showing user information. Also add Users controller with a show action and defined an @user variable corresponding to show action.
bundle install factory_girl_rails.  Factory girl specialized for defining active record objects.
Add file spec/factories.rb and a factory to simulate User model objects.
Test for the user how page and add a title and heading for the user profile page.
Redifining the BCypt cost factor in a test enviroment and finish 7.1.3.
Add gravatar image and sidebar, comple 7.1.4
Test for user signup, complete 7.2.1
create action that can handle signup failure (but not success).
display error message on the signup form with styling. beginning of 7.4
add the contents of the flash variable to the site layout.
Add flash message to user signup.