title: IBM Watson Document Conversion not working at all
body: <p>We recently implemented the Document Conversion API from IBM Watson. 
  We always get the error, even though we specify the document type: </p>
  
  <pre><code>415 Unsupported Media Type - The media type of the input file is not supported. Specify the MIME type of the document if auto-detection was not correct.
  </code></pre>
  
  <p>We are trying to convert PDF's to plain text. Even the sample PDF from IBM didn't work for us.</p>