Vendor in latest urfave/cli

The latest urfave/cli has the ability for us
to use short options when it is a bool.

Signed-off-by: baude <bbaude@redhat.com>

Closes: #100
Approved by: rhatdan

vendor/github.com/urfave/cli/help.go

@@ -29,6 +29,7 @@ AUTHOR{{with $length := len .Authors}}{{if ne 1 $length}}S{{end}}{{end}}:
    {{end}}{{$author}}{{end}}{{end}}{{if .VisibleCommands}}
 
 COMMANDS:{{range .VisibleCategories}}{{if .Name}}
+
    {{.Name}}:{{end}}{{range .VisibleCommands}}
      {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{if .VisibleFlags}}