Advances in updating-users
	modified:   Gemfile
	modified:   Gemfile.lock
	modified:   app/assets/stylesheets/custom.css.scss
	modified:   app/controllers/sessions_controller.rb
	modified:   app/controllers/users_controller.rb
	modified:   app/helpers/sessions_helper.rb
	modified:   app/helpers/users_helper.rb
	modified:   app/views/layouts/_header.html.erb
	new file:   app/views/users/index.html.erb
	new file:   lib/tasks/sample_data.rake
	modified:   spec/factories.rb
	modified:   spec/requests/authentication_pages_spec.rb
	modified:   spec/requests/user_pages_spec.rb