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.
add changes.
Merge branch 'feature/support_simple_form_type_mapping' of https://github.com/lengarvey/reform

Conflicts:
	lib/reform/form/active_record.rb