Script/EoE: Some fixes here and there

* Add db support for Power Sparks, Teleports and Drakes
* Fix Power Sparks animations and texts and add support for giving buff to players + warning
* Fix Power Spark way of stacking - should be MultiSlot aura, didn't stack before either way
* Teleporters mechanic is fixed and will summon only 1 spark per 30-35 sec
* Fixed players getting mounted on 3rd phase
* Cleanned some wrong aggro handling, but whole aggro/attack system should be rewritten to get it working blizz
That is for today, this doesn't fix the whole instance by any means!