Null check for broken items

Prevent NPC's from picking up items
Include default layer to height detection
Move item above entities of type HelicopterDebris (both helicopter and apc debris are of this type)

Auto-update config with new item categories when added to game

More collision layers for height adjustment

Changed frame budget ms to 0.25 (10fps drop with ~350 rotating items)
Applied rotation correction to m39 and thompson

Fixed items dropping through floor on unload
Minor code refactor
Budget item rotator processing to 20ms per frame

Removed reflection usage from newly exposed field

Added support for my multi-arena plugin

The config has changed! Back-up and delete your old config before updating

Reworked config to be a bit clearer
Added config option to apply rotation to dropped item containers (backpacks from bodies and chests)
Added config option to allow collision pickup of dropped item containers

Added chat command to toggle collision pickup (/ap)