MAINT: Add --use-mirrors to Travis CI build script
MAINT: Add --use-mirrors to Travis CI build script

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