Improvements to Goals and Priorities:

- Added moveConflictingGoals function (to prevent duplicate goal priorities)
- Fixed FollowPlayerGoal to not clear the this.targetPlayer variable when stop() is called. This can be temporarily stopped due to a higher priority goal.
- Updated TALK priority to 2, and FOLLOW priority to 3, for maximum compatability across entities, without overriding their most important survival/attack goals.