title: PyPdf Merge error
body: <p>When i merge several Pdf pages using PyPdf into one single page using <code>mergeTranslatedPage</code>, i got some unknown characters, these unknown squares are the characters not included in the last merged page, after some research i think that the method <code>_merge_ressources</code> not working very well , because the later page could overwrite the ressources of the older pages ,  i tried <code>page1.compressContentStreams()</code> after each merge but without a result.</p>
  
  <p>in <a href="https://docs.google.com/folder/d/0BwyGQjPp56zjRzIzTG5oZGdRbUE/edit" rel="nofollow">this link</a> you will see an example of the PDF that has been merged and the PDF result.</p>
  
  <p>Any help please</p>