Detective Revolver nerf. Uses agony instead of...

stun and weaken. Also changed the shotgun's stunshot to be a very powerful agony based shotgun shell. Beanbags are not for combat, stunshots are.
Readjusted agony of weakbullet.
Merge pull request #5587 from SparklySheep/patch-4

Detective Revolver nerf. Uses agony instead of...