DOC: Added whatsnew for conda build
DOC: Added whatsnew for conda build

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