Fixed Gravity/Physics Gun world model
* It is no longer changing its light level based on rotation (fixed normals)
* Add 3rd skin for the mega gravity gun, used by c++ code
* Adjusted model origin to match the HL2 model (we are using HL2DM one) for NPC animations
* Fixed physics model not matching the visual model
Update some weapon icons with poor constrast
Fixed toolgun world model light origin
Add thumbnail for nb_example so people stop pestering about it
Potential fix for HUDWeaponPickedUp getting wrong entities
Updated TTT
* Add weapon group spawnflags to ttt_random_weapon
Antlion Grub ragdoll inherits color/material from the "npc"
* It's not a real NPC
Add a copy button to kick reason popup