Update the help with push/pull

commands.go

@@ -45,6 +45,8 @@ func (srv *Server) Help() string {
 		{"logs", "Fetch the logs of a container"},
 		{"port", "Lookup the public-facing port which is NAT-ed to PRIVATE_PORT"},
 		{"ps", "List containers"},
+		{"pull", "Pull an image or a repository to the docker registry server"},
+		{"push", "Push an image or a repository to the docker registry server"},
 		{"restart", "Restart a running container"},
 		{"rm", "Remove a container"},
 		{"rmi", "Remove an image"},