update git/ssh vcs forms;  clarify which forms support '-e'
update git/ssh vcs forms;  clarify which forms support '-e'

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