title: Joinjs Cell vs Cellview
body: <p>In the documentation of JointJS I have often seen the terms <code>cell</code> and <code>cellview</code>. I know cell is the an <code>Item cell</code> on the graph but what is meant by <code>cellView</code>. I tried to find myself but could not figure it out !!
  E.g on this link <a href="http://jointjs.com/api#joint.dia.Paper:events" rel="nofollow">List of triggered events</a></p>
  
  <p>following line is written:</p>
  
  <p><strong><code>cell: pointerdown</code> - triggered when a pointer is pressed on a cell. Takes cellView, evt, x and y as arguments.</strong></p>
  
  <p>what is this <code>cellView</code> here ?</p>