Dynamic Stealth

Improved entities' ability to pathfind long distances toward an attack target (without increasing computation costs)
Fixed player head rotations not updating correctly (for other players) when the player is not moving
Fixed basic sight logic error: entities can now always "see" (perceive) themselves
Fixed leashes not being visible when they should
Fixed bug where threat level would reset when a previously unknown attacker was first spotted
Fixed spiders (and probably certain other mobs) from homing in on a target when they don't know where that target is
Fixed spiders (and probably certain other mobs) from walking off ledges when fleeing or searching for their threat target
Fixed bug where mobs close to reaching their "cower" position would stutter-step toward it
Fixed missing profiler end call
Bacchanalian Mobs (not yet release) compat; credits go to Purple Print (the Bacchalian Mobs mod author)