docs: def pre(self, command, output_dir, kw):
          """
          Prepare some context before install
          
          Added kwargs in ``kw`` will be accessible into paste template files
          """
          # Build a random secret_key
          chars = u'abcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*(-_=+)'
          kw['secret_key'] = ''.join([ choice(chars) for i in range(50) ])
  
          # Paste version
          kw['epaster_template_name'] = u'emencia-paste-djangocms-3'
          kw['epaster_template_version'] = template_version