title: How do I preload images into dropzone.js
body: <p>I have a dropzone.js instance on a web page with the following options:</p>
  
  <pre><code>autoProcessQueue:false
  uploadMultiple:true
  parallelUploads:20
  maxFiles:20
  </code></pre>
  
  <p>It is programmatically instantiated, as it is part of a larger form.  I have it rigged up to process the queue when the form is submitted.  </p>
  
  <p>The goal is for my users to be able to use the dropzone to manage images for an item, so when I load my 'edit/update' view for an item, I'd like to preload the dropzone with the images that had previously been uploaded for that item.  Is there a good way to implement this so that the already-there items don't get re-uploaded when they submit their changes to the image list?</p>