func New() (UUID, error) {
	var uuid [16]byte
	_, err := io.ReadFull(rander, uuid[:])
	if err != nil {
		return [16]byte{}, err
	}
	uuid[6] = (uuid[6] & 0x0f) | 0x40  
	uuid[8] = (uuid[8] & 0x3f) | 0x80  
	return uuid, nil
}
New generates a new uuid.
package uuid  
import (
	"bytes"
	"crypto/rand"
	"io"
)
type UUID [16]byte
var rander = rand.Reader