title: Unresolved reference: 'django' error in PyCharm
body: <p>I'm trying to import:</p>
  
  <pre><code>from django.db import models
  </code></pre>
  
  <p>PyCharm underlines <code>django.db</code> and complains: <code>Unresolved reference 'django'</code>.</p>
  
  <p>How do I get PyCharm to recognize Django?</p>