added ignore_errors for some rmtree-s in remove_temporary_source
added ignore_errors for some rmtree-s in remove_temporary_source

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