Support column type interrogation

Delegate to the model for `column_for_attribute`

Implement `column_for_attribute` on reform enabled forms. simple-form and
formtastic call `column_for_attribute` on the form object in order to
determine which html input tag to generate for a particular field.

See: https://github.com/plataformatec/simple_form/blob/master/lib/simple_form/form_builder.rb#L525