[IMP] add ability to clone-and-extend registries
[IMP] add ability to clone-and-extend registries

havt/openerp-web,havt/openerp-web,akretion/openerp-web,akretion/openerp-web,havt/openerp-web,havt/openerp-web,akretion/openerp-web,havt/openerp-web