title: New Symfony 3 installation: Could not open input file: app/console in composer install
body: <p>I installed a fresh symfony3-instance via the official symfony-installer (<a href="http://symfony.com/download" rel="noreferrer">http://symfony.com/download</a>). After doing the first things, I commited the project to Git and cloned it the other day on another computer. 
  After the cloning I ran "composer install" to install all the symfony-dependencies.
  Now comes the problem: The script <code>ScriptHandler::clearCache</code> stops with an error: <code>Could not open input file: app/console</code>.
  Thats right - symfony3 has a new directory-structure - so the <code>console</code> resides now in <code>/bin</code> - not in <code>/app</code>.
  How can I tell composer/the project to use the new structure instead of the old one?</p>
  
  <p>I read here (<a href="https://stackoverflow.com/questions/23993295/what-is-the-new-symfony-3-directory-structure">What is the new Symfony 3 directory structure?</a>) about the console-command <code>SENSIOLABS_ENABLE_NEW_DIRECTORY_STRUCTURE=true</code> - but that doesn't work in my case.</p>
  
  <p>Any tips?</p>