title: syntax error while using YOWSUP
body: <p>i am following this tutorial : <a href="http://xebee.xebia.in/index.php/2013/11/25/yowsup-the-whatsapp-api/" rel="nofollow">http://xebee.xebia.in/index.php/2013/11/25/yowsup-the-whatsapp-api/</a></p>
  
  <p>in step 3 when i execute this on my terminal :</p>
  
  <pre><code>$ python yowsup-cli -c config.example -r sms
  </code></pre>
  
  <p>i get a syntax error saying</p>
  
  <pre><code>Detected cc: 20
  Failed, reason: old_version. Checking for a new token..
  Fetched a new token, persisting !
  Now retrying the request..
  status: b'fail'
  reason: b'old_version'
  </code></pre>
  
  <p>can any body help how can i remove this error</p>
  
  <p>i m a newbie to python</p>