title: Add dss dictionary
body: <p>I'm using pdfBox to complete a pades document with the revocation information. The objective is that the document becomes LTV enabled.</p>
  
  <p>The document I'am using has 1 signature and one timestamp. I've got the necessary crl/ocsp tokens.</p>
  
  <p>My question is how I can I construct an COSDictionary having the response from CRL and OCSP?</p>
  
  <pre><code>InMemoryDocument doc = new InMemoryDocument(getFile());
  PDDocument document = PDDocument.loadNonSeq(doc.openStream(), null);
  
  COSDictionary cosDictionary = document.getDocumentCatalog().getCOSDictionary();
  ...
  
  cosDictionary.setNeedToBeUpdate(true);
  </code></pre>
  
  <p>Thanks</p>