title: Save jointjs diagram drawn on paper, which can be rendered to paper to edit
body: <p>Working on jointjs diagrams on paper.
  I am able to download the diagram drawn on a paper using following code:</p>
  
  <pre><code>var svgDoc = paper.svg;
  var serializer = new XMLSerializer();
  var svgString = serializer.serializeToString(svgDoc);
  </code></pre>
  
  <p>Now I want to save this svg on server, which can be rendered again to paper so that I can edit it and save again.</p>
  
  <p>Is it possible in jointjs?</p>