title: Rails 5 ignoring /lib class?
body: <p>I've used <a href="http://www.jetthoughts.com/blog/tech/2014/08/27/5-steps-to-add-remote-modals-to-your-rails-app.html">this method</a> for modals in rails. It works really well, but I've just upgraded to Rails 5 beta3, and now it's not working in production.</p>
  
  <p>I get this error:</p>
  
  <pre><code>Completed 500 Internal Server Error in 22ms (ActiveRecord: 0.9ms)
  
  NameError (uninitialized constant ApplicationController::ModalResponder):
  
  app/controllers/application_controller.rb:26:in `respond_modal_with'
  app/controllers/tools_controller.rb:28:in `new'
  </code></pre>
  
  <p>Is my inheritance thrown off with Rails 5? </p>
  
  <p>My <code>class ModalResponder &lt; ActionController::Responder</code> is in <code>/lib</code> and works in development...</p>
  
  <p>Looking for info on changes with rails 5, but sources are limited to my knowledge. </p>