title: xlwt module - saving xls unicode error
body: <p>I'm trying to save some text with xlwt module, creating new xls document and saving text there.So far it worked great, until I came across unicode text: for example simple string '80°'.</p>
  
  <p>When I call <code>book.save('simple.xls')</code> I get <code>UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2</code>.Is there any way I can avoid that?</p>