History

2.x

Selects (and MultiSelects) can take groups of items and render them as <optgroup> or <fieldset>.
The clean and vprepare` methods of a field can now be defined as a form method with the signature clean_fieldname(py_value, **kwargs) and prepare_fieldname(obj_value, **kwargs).
Added prepare and clean methods to the form so a user can overwrite them to store there the logic of pre and post-processing the data, keeping that logic in the form itself instead of in a view.
Several bugfixes