title: How do I set a backend for django-celery. I set CELERY_RESULT_BACKEND, but it is not recognized
body: <p>I set CELERY_RESULT_BACKEND = "amqp" in celeryconfig.py
  but I get:</p>
  
  <pre><code>&gt;&gt;&gt; from tasks import add
  &gt;&gt;&gt; result = add.delay(3,5)
  &gt;&gt;&gt; result.ready()
  
  Traceback (most recent call last):
    File "&lt;console&gt;", line 1, in &lt;module&gt;
    File "/djangoprojects/venv/local/lib/python2.7/site-packages/celery/result.py", line 105, in ready
      return self.state in self.backend.READY_STATES
    File "/djangoprojects/venv/local/lib/python2.7/site-packages/celery/result.py", line 184, in state
      return self.backend.get_status(self.task_id)
    File "/djangoprojects/venv/local/lib/python2.7/site-packages/celery/backends/base.py", line 414, in _is_disabled
      raise NotImplementedError("No result backend configured.  "
  NotImplementedError: No result backend configured.  Please see the documentation for more information.
  </code></pre>