Basic skeleton for dist binary

Signed-off-by: Arnaud Porterie <arnaud.porterie@docker.com>

cmd/dist/pull.go

@@ -0,0 +1,21 @@
+package main
+
+import "github.com/codegangsta/cli"
+
+var (
+	commandPull = cli.Command{
+		Name:   "pull",
+		Usage:  "Pull and verify an image from a registry",
+		Action: imagePull,
+		Flags: []cli.Flag{
+			cli.StringFlag{
+				Name:  "r,registry",
+				Value: "hub.docker.io",
+				Usage: "Registry to use (e.g.: localhost:5000)",
+			},
+		},
+	}
+)
+
+func imagePull(c *cli.Context) {
+}