title: vaadin 7 websockets
body: <p>I am newbie to vaadin. I have few questions:</p>
  
  <ol>
  <li><p>Does Vaadin 7 or later version supports websockets?</p></li>
  <li><p>Does Vaadin has any other features like pushing data from server to client (e.g. websockets)?</p></li>
  </ol>