Fixed issue with turret shooting twice.
Added input parameters for turret to set its effective Range.
Renamed TurretEffectiveRange CollisionDomain (it doesn't have to be used for the turret)
Refactored EnemyGraphics and EtherEnemyGraphics; images now drawn according to direction of enemy.
Status now has a direction attribute, which can be flipped. LemmingBehavior now uses this instead of having its own stored direction.