title: django-rest-framework: aserializer.data returns ReturnDict and OrderedDict instead of dict object
body: <p>I have written a model serializer class for a model. When I test to see if it serializes properly I get following error.</p>
  
  <p><code>AssertionError: ReturnDict([(u'id', 1), ('apple', OrderedDict([(u'id', 1), ('data', u'this is a apple data.')])) ...</code></p>
  
  <p>I tried converting it to dict wrapping aserializer.data to dict function like</p>
  
  <p><code>dict(aserializer.data)</code></p>
  
  <p>Then I get following error.</p>
  
  <p><code>AssertionError: {'status': False, 'http': OrderedDict([(u'id', 1), ...</code></p>
  
  <p>How to get dictionary data from a serializer.</p>