DOC: Clarificatory comments in HistoryContainer.
DOC: Clarificatory comments in HistoryContainer.

wilsonkichoi/zipline,CDSFinance/zipline,euri10/zipline,DVegaCapital/zipline,semio/zipline,florentchandelier/zipline,Scapogo/zipline,erikness/AlephOne,michaeljohnbennett/zipline,quantopian/zipline,semio/zipline,YuepengGuo/zipline,michaeljohnbennett/zipline,morrisonwudi/zipline,jordancheah/zipline,CDSFinance/zipline,nborggren/zipline,grundgruen/zipline,otmaneJai/Zipline,stkubr/zipline,cmorgan/zipline,aajtodd/zipline,zhoulingjun/zipline,cmorgan/zipline,umuzungu/zipline,alphaBenj/zipline,otmaneJai/Zipline,quantopian/zipline,kmather73/zipline,gwulfs/zipline,dmitriz/zipline,humdings/zipline,iamkingmaker/zipline,chrjxj/zipline,zhoulingjun/zipline,keir-rex/zipline,joequant/zipline,sketchytechky/zipline,jimgoo/zipline-fork,umuzungu/zipline,ChinaQuants/zipline,StratsOn/zipline,dkushner/zipline,morrisonwudi/zipline,enigmampc/catalyst,Scapogo/zipline,wilsonkichoi/zipline,MonoCloud/zipline,mattcaldwell/zipline,AlirezaShahabi/zipline,erikness/AlephOne,alphaBenj/zipline,bartosh/zipline,jordancheah/zipline,ronalcc/zipline,bartosh/zipline,sketchytechky/zipline,magne-max/zipline-ja,euri10/zipline,dmitriz/zipline,stkubr/zipline,aajtodd/zipline,dkushner/zipline,mattcaldwell/zipline,MonoCloud/zipline,joequant/zipline,humdings/zipline,AlirezaShahabi/zipline,grundgruen/zipline,StratsOn/zipline,keir-rex/zipline,wubr2000/zipline,YuepengGuo/zipline,iamkingmaker/zipline,gwulfs/zipline,DVegaCapital/zipline,ChinaQuants/zipline,wubr2000/zipline,florentchandelier/zipline,nborggren/zipline,kmather73/zipline,ronalcc/zipline,enigmampc/catalyst,chrjxj/zipline,jimgoo/zipline-fork,magne-max/zipline-ja