title: FormSetView save with Django Extra Views
body: <p>as shown in the following code i am trying to save the formset once it is validated. but i always get <code>object has no attribute 'save'</code>error. its great if someone can help me to use <code>FormSetView</code> to save and update data using forms.</p>
  
  <pre><code>from extra_views import FormSetView
  from foo.forms import MyForm
  
  class MyFormSetView(FormSetView):
      template_name = 'myformset.html'
      form_class = MyForm
      success_url = 'success/'
  
      def formset_valid(self, formset):
          formset.save()
          return super(MyFormSetView, self).formset_valid(formset)
  </code></pre>