009: A class-level testing helper, config.autoload_lib with Xavier Noria

The with_routing helper method can now be used at the class level, added to that, the new autoload_lib configuration options mean we can autoload and eager load library code inside of our Rails applications. Oh, and we have the show's first sponsor -- AppSignal! AppSignal APM offers error tracking, performance monitoring, dashboards, host metrics, and alerts. Built for Ruby, Ruby on Rails, Elixir, Node.js, and JavaScript.A class-level testing helperA config.autoload_lib configuration optionAppSignal is our new sponsor!