title: django.core.servers.basehttp.FileWrapper disappears in Django 1.9
body: <p>I am migrating from django 1.8 to 1.9. and I got the following error:</p>
  
  <blockquote>
    <p>ImportError: cannot import name 'FileWrapper'</p>
  </blockquote>
  
  <p>I import it as follow:</p>
  
  <pre><code>from django.core.servers.basehttp import FileWrapper
  </code></pre>
  
  <p>Searching this name in django 1.9 release notes gives no result. What is the replacement for <code>FileWrapper</code> ?</p>