Allows Projectile Sharpness to Matter

Created by: Shadowmech88

This alters /mob/living/bullet_act() so that it passes the sharpness var of the projectile to apply_damage() meaning that giving a projectile sharpness will actually change the way the projectile affects targets in the same way that giving a melee weapon sharpness does, such as increased chance of bleeding and limb severing.

Tested with a 100 sharpness bullet, seems to work properly out of the box.