Added new function for optimization.

Added was new category "Item managment" in menu called.
New category can delete all drop from dead enemies and clear player inventory.

Also

Added admin protection(Yeah...). Now raid spawner cannot be spawned by default user, only admin or host can. Also and for menu too.

Added item drop system.
You can now in menu add items, which will be drops from NPC after death.

Added custom NPCs support.