title: Collecting staticfiles throws ImproperlyConfigured
body: <p>I'm using Django 1.7. When deploying my site to a Production server and running <code>collectstatic</code>, I get following error message:
  <strong><code>django.core.exceptions.ImproperlyConfigured: The STATICFILES_DIRS setting should not contain the STATIC_ROOT setting</code></strong></p>
  
  <p>I use split settings; my production <code>local.py</code> contains:</p>
  
  <pre><code>STATIC_ROOT = '/home/username/projects/site/static/'
  </code></pre>
  
  <p>and my <code>base.py</code> contains:</p>
  
  <pre><code>STATICFILES_DIRS = (
      os.path.join(BASE_DIR, 'static'),
  )
  </code></pre>