title: Silex add Routing file with all the routes to controllers
body: <p>im using silex to create my API REST.
  In a example, i found a way to create the routes </p>
  
  <pre><code>$api = $this-&gt;app["controllers_factory"];
  $api-&gt;get('/notes', "notes.controller:getAll");
  $api-&gt;get('/notes/{id}', "notes.controller:getOne");
  $api-&gt;post('/notes', "notes.controller:save");
  $api-&gt;put('/notes/{id}', "notes.controller:update");
  $api-&gt;delete('/notes/{id}', "notes.controller:delete");
  </code></pre>
  
  <p>Im looking for a way to inlcude an array with all the routes and create and instance on my app bootstrap file. Any idea ?</p>