Error message when `github open [url]`
Error message when `github open [url]`

CLI will now show an error message if github open is called on a remote URL rather than a local path.

kactus-io/kactus,artivilla/desktop,j-f1/forked-desktop,j-f1/forked-desktop,shiftkey/desktop,kactus-io/kactus,artivilla/desktop,artivilla/desktop,desktop/desktop,shiftkey/desktop,kactus-io/kactus,j-f1/forked-desktop,say25/desktop,desktop/desktop,kactus-io/kactus,desktop/desktop,shiftkey/desktop,say25/desktop,say25/desktop,say25/desktop,artivilla/desktop,shiftkey/desktop,desktop/desktop,j-f1/forked-desktop