[dist] Version bump. 0.4.0
[dist] Version bump. 0.4.0

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