added passedOver option to create property function options argument, allowing the returned value to be omitted from the mapped array
added passedOver option to create property function options argument, allowing the returned value to be omitted from the mapped array

wikieswan/knockout.mapping,jesulink2514/knockout.mapping,tilhom/knockout.mapping,jesulink2514/knockout.mapping,SteveSanderson/knockout.mapping,humbleBeginner/knockout.mapping,drewwestphal/knockout.mapping,humbleBeginner/knockout.mapping,gregoriusxu/knockout.mapping,LittleHelicase/knockout.mapping,lucaslago/knockout.mapping,mespaceintime/knockout.mapping,lucaslago/knockout.mapping,wikieswan/knockout.mapping,amilachamikara/knockout.mapping,drewwestphal/knockout.mapping,amilachamikara/knockout.mapping,LittleHelicase/knockout.mapping,mespaceintime/knockout.mapping,tilhom/knockout.mapping,wikieswan/knockout.mapping,humbleBeginner/knockout.mapping,tilhom/knockout.mapping,amilachamikara/knockout.mapping,lucaslago/knockout.mapping,drewwestphal/knockout.mapping,gregoriusxu/knockout.mapping,jesulink2514/knockout.mapping,mespaceintime/knockout.mapping,gregoriusxu/knockout.mapping