[readme] changes to image part of readme
[readme] changes to image part of readme

dionjwa/pkgcloud,DonSchenck/pkgcloud,bunglestink/pkgcloud,andrewsomething/pkgcloud,Phanatic/pkgcloud,mdsummers/pkgcloud,temka1234/pkgcloud,hacor/pkgcloud,apla/pkgcloud,pkgcloud/pkgcloud,Hopebaytech/pkgcloud,Phanatic/pkgcloud,mcanthony/pkgcloud,songanbui/pkgcloud