fixes issue #44

The example app seems to be missing the form_class which is required
for CreateView and UpdateView.

example/example/notes/forms.py

@@ -0,0 +1,9 @@
+# coding=utf-8
+from django.forms import ModelForm
+from .models import Note
+
+
+class NoteForm(ModelForm):
+    class Meta:
+        model = Note
+        fields = ['message', 'complete']

example/example/notes/views.py

@@ -1,5 +1,6 @@
 from django.core.urlresolvers import reverse_lazy
 from example.notes.models import Note
+from example.notes.forms import NoteForm
 from vanilla import CreateView, DeleteView, ListView, UpdateView
 
 
@@ -9,11 +10,13 @@ class ListNotes(ListView):
 
 class CreateNote(CreateView):
     model = Note
+    form_class = NoteForm
     success_url = reverse_lazy('list_notes')
 
 
 class EditNote(UpdateView):
     model = Note
+    form_class = NoteForm
     success_url = reverse_lazy('list_notes')