Merge branch 'bug-consumidor-final-cuit-no-obligatorio'
Agrego campos controlling_entity y controlling_entity_number
Merge branch 'feature-new-controlling-fields'
Si es consumidor_final se setea vat_number = u''. Se corrige el validate() de party para no invocar a check_vat si es consumidor final
Merge branch 'bug-cliente-no-tiene-cuit'
corrigo typo
Merge pull request #23 from gcoop-libre/master

Consumidor final no requiere CUIT