Fixes handling of accounting/invoicing-related fields on partners that are not "commercial entities" (either marked as "is_company" or parentless). The corresponding fields are also hidden from form views on these partners and replaced by a short sentence and a link to edit the "master fields" on the commercial entity. This corresponds to part B of the solution described on bug 1160365. lp bug: https://launchpad.net/bugs/1160365 fixed bzr revid: odo@openerp.com-20130407235013-j3tv4uxy46eej43i