integer/float fields were not offering auto-completion in search views, making them unsearchable except via advanced search. This patch adds the missing complete() function and removes the incorrect value_from() function that did not conform to the 7.0 search view API. It seemed to be a leftover of the 6.1 search field implementation of get_value(), wrongly renamed for 7.0. Also includes corresponding tests. bzr revid: odo@openerp.com-20130418112001-388op1t8ugr0rhfn