title: Changing the default App namespace to something else
body: <p>I'm about to start a new project and I've decided to go with sf4.
  So first I've created a new sf project <code>composer create-project symfony/skeleton</code></p>
  
  <p>But this time I want to get rid of the default App namespace and change it to a specific, project related namespace. But I'm not really sure how to do this. I've tried to edit the psr autoload in the composer.json and run <code>composer dump-autoload</code> but I'm getting this error</p>
  
  <blockquote>
    <p>PHP Fatal error:  Uncaught Symfony\Component\Debug\Exception\ClassNotFoundException: Attempted to load class "Kernel" from namespace "App".</p>
  </blockquote>
  
  <p>I hope someone can help me.</p>
  
  <p>Greets</p>