title: Insert image to vaadin grid
body: <p><em>How to show images (<strong>blob type</strong>) into vaadin grid ?</em></p>
  
  <p><em>Is there any good example ?</em></p>
  
  <p><em>How to define right class for coloumns that will hold blob (i store my images as blob in mysql) type image in vaadin grid ?</em>
  <strong>I also want to show default picture (user_pic.jpg) in vaadin grid from resources ("/WEB-INF/images/user_pic.jpg") if user doesn't have picture.</strong></p>
  
  <p><strong>PSEUDO CODE:</strong></p>
  
  <pre><code>if (user have picture)
    show his picture in grid
  else 
   show default picture from resources
  </code></pre>