Basic skeleton for dist binary

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

cmd/dist/main.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"os"
+
+	"github.com/codegangsta/cli"
+)
+
+func main() {
+	app := cli.NewApp()
+	app.Name = "dist"
+	app.Usage = "Package and ship Docker content"
+
+	app.Action = commandList.Action
+	app.Commands = []cli.Command{
+		commandList,
+		commandPull,
+		commandPush,
+	}
+	app.Run(os.Args)
+}