UPDATED: Eluna

ADDED: New Unit methods

* SetCreatorGUID(uint64 guid) * SetMinionGUID(uint64 guid) * SetCharmerGUID(uint64 guid) * SetPetGUID(uint64 guid) * GetOwnerGUID() * GetCreatorGUID() * GetMinionGUID() * GetCharmerGUID() * GetCharmGUID() * GetPetGUID() * GetCritterGUID() * GetCharmerOrOwnerGUID() * GetCharmerOrOwnerOrOwnGUID()