title: Cytoscape.js - create circular nodes with size
body: <p>In cytoscape I'd like to create nodes that are circular, with the diameter depending on the node label (the label is centered in the node). I've set the following:</p>
  
  <pre><code>style: {
      'shape': 'ellipse',
      'width': 'label'
  }
  </code></pre>
  
  <p>How do I get the height to depend on the width value? Setting 'height': 'label' sets the height to the height of the label. </p>