* Add missing MovementInform handler filters for Icehowl.
* Remove UNIT_FLAG_OOC_NOT_ATTACKABLE for Beasts of Northrend.
* Fix codestyle for Beasts of Northrend.
- Fixed achievement "The Alterac Blitz" in Alterac Valley
- Fixed achievement "Let's Get This Done" in Arathi Basin
- Fixed achievement "Flurry" in Eye of the Storm