title: Why feedparser for Python does not see all elements in the feed
body: <p>I use the following code:</p>
  
  <pre><code>import feedparser as fp
  
  if __name__ == '__main__':
      url = 'http://www.careerbuilder.de/RTQ/rss20.aspx?rssid=RSS_PD&amp;num=25&amp;geoip=false&amp;ddcompany=false&amp;ddtitle=false&amp;cat=JN038'  
      d = fp.parse(url)
      for entry in d.entries:
          print entry
          print '----------------------'
  </code></pre>
  
  <p>As a result I get:</p>
  
  <pre><code>{'guidislink': 0, 'published': u'Wed, 23 Apr 2014 04:00:00 Z', 'published_parsed': time.struct_time(tm_year=2014, tm_mon=4, tm_mday=23, tm_hour=4, tm_min=0, tm_sec=0, tm_wday=2, tm_yday=113, tm_isdst=0), 'title': u'Bankkaufmann (m/w)'}
  ----------------------
  {'guidislink': 0, 'published': u'Wed, 23 Apr 2014 04:00:00 Z', 'published_parsed': time.struct_time(tm_year=2014, tm_mon=4, tm_mday=23, tm_hour=4, tm_min=0, tm_sec=0, tm_wday=2, tm_yday=113, tm_isdst=0), 'title': u'Anlagenbuchhalter (m/w)'}
  ----------------------
  {'guidislink': 0, 'published': u'Wed, 23 Apr 2014 04:00:00 Z', 'published_parsed': time.struct_time(tm_year=2014, tm_mon=4, tm_mday=23, tm_hour=4, tm_min=0, tm_sec=0, tm_wday=2, tm_yday=113, tm_isdst=0), 'title': u'Bankkaufleute (m/w)'}
  ----------------------
  </code></pre>
  
  <p>It looks like entries in the feed do not have "summary" and "link" elements. As a conformation of that, I get an error message if I try to use <code>entry.summary</code> or <code>entry.description</code>. This is strange to me since I do see <code>link</code> and <code>description</code> elements in the xml for the feed, if I open it in my browser.</p>
  
  <p>Does anybody know what I am doing wrong?</p>