title: Installing Django-channels error
body: <p>I'm trying to develop a chat application in Django on mac OS.
  I've tried to install Django-Channels in virtualenv, with this commands:</p>
  
  <pre><code>pip install channels
  
  pip install django-channels
  </code></pre>
  
  <p>but this error occurred:</p>
  
  <blockquote>
    <p>Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/4c/xy3rtg_165l0650j4tq7fvrh0000gn/T/pip-install-7anqvzhg/twisted/</p>
  </blockquote>
  
  <p>Python version = 3.5.2,<br>
  Django version = 1.11,<br>
  pip is already up-tp-date</p>