Moved Action Behaviors to separate file. BehaviorTree.* now contains only primitive Behaviors.
UnitGroup adds all units, group size, group info to Blackboard.
Updated Blackboard to contain only 1 UnitGroup.
Added FindTarget Behavior that finds best target for group.
Updated Attack Behavior that gives attack order to entire group.
Creating only 1 UnitGroup now and all units belong to this group.
Updated Delay Behavior to take delay time as parameter.
Disabled AI fog of war cheat.