mention that pre-installed pip needs to be upgraded
mention that pre-installed pip needs to be upgraded

xavfernandez/pip,atdaemon/pip,mindw/pip,esc/pip,zvezdan/pip,pypa/pip,rouge8/pip,benesch/pip,dstufft/pip,ChristopherHogan/pip,ncoghlan/pip,nthall/pip,dstufft/pip,willingc/pip,yati-sagade/pip,sigmavirus24/pip,willingc/pip,natefoo/pip,fiber-space/pip,natefoo/pip,xavfernandez/pip,zvezdan/pip,Gabriel439/pip,luzfcb/pip,RonnyPfannschmidt/pip,nthall/pip,alex/pip,rouge8/pip,sbidoul/pip,RonnyPfannschmidt/pip,luzfcb/pip,sigmavirus24/pip,ChristopherHogan/pip,willingc/pip,atdaemon/pip,Gabriel439/pip,pfmoore/pip,fiber-space/pip,esc/pip,natefoo/pip,jythontools/pip,RonnyPfannschmidt/pip,benesch/pip,zvezdan/pip,James-Firth/pip,mindw/pip,nthall/pip,James-Firth/pip,pfmoore/pip,James-Firth/pip,atdaemon/pip,jythontools/pip,alex/pip,pradyunsg/pip,xavfernandez/pip,sbidoul/pip,pradyunsg/pip,sigmavirus24/pip,techtonik/pip,pypa/pip,Gabriel439/pip,fiber-space/pip,ncoghlan/pip,ChristopherHogan/pip,rbtcollins/pip,techtonik/pip,yati-sagade/pip,rbtcollins/pip,esc/pip,dstufft/pip,yati-sagade/pip,ncoghlan/pip,mindw/pip,techtonik/pip,rbtcollins/pip,jythontools/pip,luzfcb/pip,alex/pip,benesch/pip,rouge8/pip