Basic stone monster
Add spawning of stone_monster
Play a sound when hitting the stone monster
Fix a bug that randomly occured
Dont chase dead players and decrease range of stone_monster a bit
Fix typo
Fix position offset
Tweak punch interval
Improve object handling
* Remove mobs when they are loaded after unloading
* Dont spawn them near players
* Higher interval and lower chance for ABM to decrease server load
Tweak distance and damage
Use automatic_face_movement_dir