DB/Quest: New Recruit

Fix New Recruit http://www.wowhead.com/quest=13143
Scripts/ToC: Twin Val'kyr

- Script rewritten to EventMaps
- Implemented random special ability sequence
- Adjusted timer for special abilities to 45 seconds
- Misc clean up.
Closes #7546
DB/Quest: The Vile Hold

Script Eye of Dominion / Lithestalker for http://www.wowhead.com/quest=13145
Scripts/ToC: Misc forgotten clean ups
DB/Quest: A Undead's Best Friend / Eidolan Watcher

Fix http://www.wowhead.com/quest=13169/an-undeads-best-friend and other quests using this vehicle 

Only major bug as with the lithe stalker is when player exits vehicle player should get teleported back to position where they mounted vehicle as if it was pocessed but this is vehicle
Scripts/ToC: Few codestyle changes and clean ups