1.6b6 predator

predator: kill limit is constant and increased to 50.
predator: atk and apr bonuses scaling modified to reflect constant kill limit.
predator: hate on hit removed.
predator: atk and apr bonuses shown on actor tooltip, instead of killcount.
savage hunter: rng to apply effect.
shrouded hunter: Crit shrug replaced with physpower for a less rng bonus and to provide a more offensive feel.