set nonzero exit code on failure (fixes #33)
set nonzero exit code on failure (fixes #33)

jamezpolley/pip,alex/pip,squidsoup/pip,chaoallsome/pip,esc/pip,caosmo/pip,RonnyPfannschmidt/pip,Gabriel439/pip,zenlambda/pip,mujiansu/pip,habnabit/pip,dstufft/pip,msabramo/pip,minrk/pip,Gabriel439/pip,natefoo/pip,tdsmith/pip,natefoo/pip,mattrobenolt/pip,nthall/pip,willingc/pip,xavfernandez/pip,cjerdonek/pip,h4ck3rm1k3/pip,jmagnusson/pip,zvezdan/pip,blarghmatey/pip,tdsmith/pip,dstufft/pip,zorosteven/pip,pjdelport/pip,jmagnusson/pip,luzfcb/pip,techtonik/pip,James-Firth/pip,haridsv/pip,fiber-space/pip,xavfernandez/pip,RonnyPfannschmidt/pip,rbtcollins/pip,alex/pip,willingc/pip,pjdelport/pip,blarghmatey/pip,graingert/pip,qbdsoft/pip,prasaianooz/pip,James-Firth/pip,zorosteven/pip,zenlambda/pip,patricklaw/pip,pypa/pip,h4ck3rm1k3/pip,pjdelport/pip,zorosteven/pip,Gabriel439/pip,pfmoore/pip,erikrose/pip,radiosilence/pip,harrisonfeng/pip,Ivoz/pip,xavfernandez/pip,Carreau/pip,yati-sagade/pip,zvezdan/pip,qbdsoft/pip,fiber-space/pip,yati-sagade/pip,atdaemon/pip,graingert/pip,sigmavirus24/pip,prasaianooz/pip,harrisonfeng/pip,msabramo/pip,Carreau/pip,Ivoz/pip,erikrose/pip,qwcode/pip,James-Firth/pip,minrk/pip,KarelJakubec/pip,sigmavirus24/pip,KarelJakubec/pip,alex/pip,pradyunsg/pip,jamezpolley/pip,squidsoup/pip,KarelJakubec/pip,zvezdan/pip,rouge8/pip,squidsoup/pip,domenkozar/pip,caosmo/pip,haridsv/pip,chaoallsome/pip,davidovich/pip,mattrobenolt/pip,jasonkying/pip,benesch/pip,haridsv/pip,harrisonfeng/pip,erikrose/pip,esc/pip,cjerdonek/pip,jasonkying/pip,supriyantomaftuh/pip,rbtcollins/pip,sbidoul/pip,ianw/pip,atdaemon/pip,graingert/pip,habnabit/pip,sigmavirus24/pip,mindw/pip,sbidoul/pip,habnabit/pip,fiber-space/pip,mindw/pip,davidovich/pip,atdaemon/pip,supriyantomaftuh/pip,h4ck3rm1k3/pip,RonnyPfannschmidt/pip,luzfcb/pip,ChristopherHogan/pip,natefoo/pip,techtonik/pip,wkeyword/pip,pypa/pip,pradyunsg/pip,ncoghlan/pip,ChristopherHogan/pip,jamezpolley/pip,techtonik/pip,blarghmatey/pip,jythontools/pip,willingc/pip,prasaianooz/pip,benesch/pip,supriyantomaftuh/pip,rbtcollins/pip,ChristopherHogan/pip,nthall/pip,zenlambda/pip,ncoghlan/pip,alquerci/pip,pfmoore/pip,ianw/pip,mujiansu/pip,benesch/pip,nthall/pip,caosmo/pip,patricklaw/pip,rouge8/pip,luzfcb/pip,tdsmith/pip,qbdsoft/pip,rouge8/pip,davidovich/pip,wkeyword/pip,ncoghlan/pip,esc/pip,yati-sagade/pip,jmagnusson/pip,alquerci/pip,jythontools/pip,jasonkying/pip,qwcode/pip,dstufft/pip,chaoallsome/pip,mujiansu/pip,mindw/pip,jythontools/pip,wkeyword/pip