title: Installed Virtualenv and activating virtualenv doesn't work
body: <p>I cloned my Django Project from Github Account and activated the virtualenv using famous command <code>source nameofenv/bin/activate</code>
  And when I run <code>python manage.py runserver</code> </p>
  
  <p>It gives me an error saying:</p>
  
  <blockquote>
    <p>ImportError: Couldn't import Django. Are you sure it's installed and available on your PYTHONPATH environment variable? Did you forget to activate a virtual environment?</p>
  </blockquote>