title: Populate a QTextDocument from a .odt file
body: <p>I am writing a rich text editor using C++ and Qt.
  For now, I would like it to support (at least) the .odt format.</p>
  
  <p>I found QTextDocumentWriter for writing the contents of the QTextDocument to a file, but I can't seem to find anything to read that back into the QTextDocument, which obviously makes saving it sort of useless in the first place.</p>
  
  <p>So the question is, how do I load an .odt document into a QTextDocument?</p>