title: JQuery File Upload preview File Type to allow all file types
body: <p>I am trying to preview different file types, but Its not working. By default jQuery File upload only previews Image files(jpeg | png | gif). But I need to display a preview for Other File types such as (pdf | doc | pptx | txt). How to achive this??
  I tried changing this, but no luck </p>
  
  <p>Existing Code:</p>
  
  <pre><code>previewFileTypes: /^image\/(gif|jpeg|png)$/,
  </code></pre>
  
  <p>My Change: (Still does not show preview for pdf, doc, ppt)</p>
  
  <pre><code>previewFileTypes: /^.*\/(gif|jpeg|png|pdf|PDF|pptx|plain|doc|docx)$/,
  </code></pre>