[12326] Keep comitter information within the cleanupHistory.sh script
[12328] Add Unit::FixateTarget

This allows to fixate a target (as long as it is valid) independendly from threat or taunt auras.

Signed-off-by: Schmoozerd <schmoozerd@cmangos>

Conflicts:
	src/game/Unit.cpp
	src/game/Unit.h
[12329] EventAI: Add new TargetTypes

Add target types:
* TARGET_T_ACTION_INVOKER_OWNER which returns the controlling unit of an action's invoker
* TARGET_T_HOSTILE_RANDOM_PLAYER which returns a random player from the threatlist
* TARGET_T_HOSTILE_RANDOM_NOT_TOP_PLAYER which returns a random player from the threatlist except topmost threat holder

Also remove unused CreatureEventAI::CanCast function

Conflicts:
	src/game/CreatureEventAI.cpp