Update README.md with correct information

	message Header {

	// "cluster" is the  number of the cluster definition. If this is incompatible,

	// the request is rejected. If it is missing, it is assumed to be 0. (0 allows systems not

	// using cluster versioning to ignore this field in the header and in the setup.)

	// the request is rejected. By default the value is 0, allowing systems not

	// using cluster versioning to ignore this field in the header and in the setup.

		optional int64 clusterVersion = 1;

		// 2 is reserved.

		// This field is set by the drive if a batch commit failed.

		// The sequence of the first operation to fail in the batch.

		// There is no guarentee that the previous sequences succeeded.

		// There is no guarantee that the previous sequences would have succeeded.

		optional int64 failedSequence = 3;

	}

	message Setup {

	// The cluster version to be checked. The default if never set is 0.

	// If this is missing, it is assumed to be unchanged;

	// This is persistent between boots of the device.

		optional int64 newClusterVersion = 1;