title: Box2D body swipe
body: <p>Can we detect a swipe gesture for box2d body? 
  For example:</p>
  
  <ul>
  <li>Detect wwipe left gesture body.y-10  </li>
  <li>Detect swipe right gesture body.x+10</li>
  <li>etc...</li>
  </ul>
  
  <p>Any ideas?</p>