title: django-toolbox: No module named from django.utils.importlib import import_module
body: <p>I've the latest version of Django, django-toolbox and Python.
  I'm using MongoDB as DB and PyMongo.
  My problem is this:
  "No module named from django.utils.importlib import import_module"</p>
  
  <p>This happens because I want to use Embedded Models and specifically, Lists of Subobjects (One-to-Many Relations) as you can see <a href="http://django-mongodb-engine.readthedocs.io/en/latest/topics/embedded-models.html#lists-of-subobjects-one-to-many-relations" rel="nofollow noreferrer">in the tutorial</a>.
  Is there a way to solve this problem or to model the Lists of Subobjects in an another way?
  Thanks.</p>
  
  <p>EDIT: I switched to Django 1.8 but now my error is </p>
  
  <pre><code>"name basestring is not defined"
  </code></pre>