title: Django Formset without instance
body: <p>In <a href="http://docs.djangoproject.com/en/dev/topics/forms/modelforms/#inline-formsets" rel="noreferrer">this</a> Django Doc explain how to create a formset that allows you to edit books belonging to a particular author.</p>
  
  <p>What I want to do is: Create a formset that allows you to ADD new book belonging to a NEW author... Add the Book and their Authors in the same formset.</p>
  
  <p>Can you gime a light? thanks.</p>