title: pdfwriter doesn't translate special characters
body: <p>I have HTML file with an external CSS.  I want to create PDF from the HTML file, but the endcoing doesn't work. HTML file works fine, but after transfering to PDF, some characters in PDF are missing. (čřě...) It happens even if I set the Charset in PDFWriter constructor. </p>
  
  <p>How do I solve this, please?</p>
  
  <pre><code> public void createPDF() {
      try {
  
          Document document = new Document();
  
  
          PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(username + ID + ".pdf"));
  
          document.open();
          String hovinko = username + ID + ".html";
  
          XMLWorkerHelper.getInstance().parseXHtml(writer, document, new FileInputStream(hovinko), Charset.forName("UTF-8"));
  
          document.close();
  
          System.out.println("PDF Created!");
      } catch (Exception ex) {
          ex.printStackTrace();
      }
  }
  </code></pre>