Adding steps for all the services sections
Adding new stub resource
Adding the TwigExtension steps
Adding DoctrineListener steps
Merge remote-tracking branch 'origin/master'

* origin/master:
  Finishing the rest!
  Finished editing!
  Finishing all of these here - more-dependency-injection being the last
  Update render-controller.rst
  woot woot
  customize all the things!
  fancy!
  update update!
  hello beautiful json!