Warlock Fixes (#281 and more)

Warlock Fixes:
  * CoE Blacklist
  * CoE only on non-tribial mobs (hp > 1000000 * groupsize)

Affliction:
  * No more malefic grasp abort/cast loop on non-elite mobs

Destruction:
  * Shadowburn on mouseover, if < 20% hp and not shadowburn debuffed