Minor fixes

Scaled down viewmodel by 5%, was too big.
Reload now uses the s1897's shells instead of the l4d1 shotgun's.
Small material tweaks.

Materials redone entirely. Seperated wood and metal mats.
Fixed issue with worldmodel flashlight.

Updated materials

Improved weighting of the pump and bolt in both first and third person. Should be perfect now.

Improved diffuse texture, now more accurate to PUBG's ingame look.

Scaled down worldmodel by 10%, it was out of scale with the other weapons.

Fixed texture issue with bolt.