Fixed retrieving the content type for Python 2.4.
Fixed retrieving the content type for Python 2.4.

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