DEV: Adds stashing to pre-commit hook.
DEV: Adds stashing to pre-commit hook.

So that the code that is linted/tested is only the staged commits.
Useful when editing by only staging parts of files via git.

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