BLD: Update Markdown library.
BLD: Update Markdown library.

Should be orthogonal to any trading simulation, Markdown is
merely used for packaging and converting the README.

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