PoI Stage 0.5

Doing this in smaller bits

- New random sif mob selector, peaceful animals
- Drone lootpile (basic placeholder loot right now until we figure out how to give them proper drone loot)
- New random spider mob selector, nurse spider and nurse hat spider (hat spider has 10 more health points and is a rare chance to spawn, woo)
- New spacesuit random spawn, medical space suits
- New Random Shotgun spawn
- New random gun spawns
- Fixed icon for random medicine spawn
- Fixed broken icon for 44 magazines
- Fixed Ice Cave dungeon walls being called 'steel'
- Added new Crystal type, to avoid the SM style crystal from spawning in crystal PoIs

code/modules/projectiles/ammunition/magazines.dm

@@ -472,7 +472,7 @@
 
 /obj/item/ammo_magazine/m44
 	name = "magazine (.44)"
-	icon_state = "44"
+	icon_state = "m44"
 	origin_tech = list(TECH_COMBAT = 2)
 	mag_type = MAGAZINE
 	caliber = ".44"

code/modules/projectiles/guns/projectile/shotgun.dm

@@ -41,6 +41,9 @@
 
 	update_icon()
 
+/obj/item/weapon/gun/projectile/shotgun/pump/slug
+	ammo_type = /obj/item/ammo_casing/a12g
+
 /obj/item/weapon/gun/projectile/shotgun/pump/combat
 	name = "combat shotgun"
 	desc = "Built for close quarters combat, the Hephaestus Industries KS-40 is widely regarded as a weapon of choice for repelling boarders. Uses 12g rounds."