$ rails generate controller hello
      create  app/controllers/hello_controller.rb
      invoke  erb
      create    app/views/hello
      invoke  test_unit
      create    test/functional/hello_controller_test.rb
      invoke  helper
      create    app/helpers/hello_helper.rb
      invoke    test_unit
      create      test/unit/helpers/hello_helper_test.rb
      invoke  assets
      invoke    coffee
      create      app/assets/javascripts/hello.js.coffee
      invoke    scss
      create      app/assets/stylesheets/hello.css.scss