This is first commit in chain for remove oudated and not used pet functionality.
* Use instead dropped table CreatureSpellData.dbc if creature_template.PetSpellDataId set (mostly hunter pets)
* Use creature_template.spellN if not set creature_template.PetSpellDataId (mostly different summon creatures)
* Fixed bug with not removing from action bar spell icon for not ranked unlearned spells.
Note: summoned controllable creatures without PetSpellDataId must have expected spells in spellN feilds for creature_template.
* Implement support achievements with refAchievement field != 0, that have criterias stored in achievement refAchievement.
* Implement support achievement complete req. with specific count of completed critirias.
* Avoid full achievement list scan at search achievement associated with criteria.
