FIX: Add last_sale_date to Position init for consistency
FIX: Add last_sale_date to Position init for consistency

umuzungu/zipline,florentchandelier/zipline,magne-max/zipline-ja,Scapogo/zipline,quantopian/zipline,alphaBenj/zipline,Scapogo/zipline,florentchandelier/zipline,bartosh/zipline,bartosh/zipline,umuzungu/zipline,quantopian/zipline,wilsonkichoi/zipline,alphaBenj/zipline,wilsonkichoi/zipline,magne-max/zipline-ja,humdings/zipline,humdings/zipline,enigmampc/catalyst,enigmampc/catalyst