Merge pull request #11 from rixx/doc_fixes

Use correct method signatures in docs

docs/forms.rst

@@ -29,15 +29,15 @@ When using a class-based ``FormView``, you could integrate it like this::
     class MySettingsView(FormView):
         form_class = MySettingsForm
 
-        def get_form_kwargs():
+        def get_form_kwargs(self):
             kwargs = super().get_form_kwargs()
             kwargs['attribute_name'] = 'settings'
             kwargs['obj'] = User.objects.get(...)
             return kwargs
 
-        def form_valid(form):
+        def form_valid(self, form):
             form.save()
             return super().form_valid(form)
 
 .. note:: Initial values for the form will be taken from the settings storage, i.e. from the given object and the
-          global and hardcoded defaults. Initial values set directly on the form or field layer are not supported.
+          global and hardcoded defaults. Initial values set directly on the form or field layer are not supported.