Added a note that cleaned_data is new in the development release.
Added a note that cleaned_data is new in the development release.

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%407197

adieu/django-nonrel,adieu/django-nonrel,adieu/django-nonrel