title: OpenERP IOError: decoder zip not available
body: <p>I have installed openERP 7 multiple times on my Ubuntu 13.04 machine.
  I am unable to create new user in openERP 7. When i try to create new user it shows message </p>
  
  <blockquote>
    <p>IOError: decoder zip not available</p>
  </blockquote>
  
  <p>Unable to post complete output of the Error message.</p>
  
  <p>I have already installed all required python packages. But have not solved it yet.</p>