The Uuid package generates and inspects UUIDs based on RFC 4122 and DCE 1.1:
Authentication and Security Services.
This package is based on the github.com/pborman/uuid package (previously named
code.google.com/p/go-uuid). It differs from these earlier packages in that a
UUID is a 16 byte array rather than a byte slice. One loss due to this change is
the ability to represent an invalid UUID (vs a NIL UUID).
