Xenobio2 Update #7 (#1910)

* Ensures cores, slimes cannot be used twice in their machines.

* Fixes xenos appearing friendly, simple_mob death problems.

Simple mobs that were dead and not of the hostile subtype wouldn't call walk(src,0), which prevents corpses from following their target.

* Cleans up trait data when a xeno or xeno product is removed.

* Slimes more likely to have amutationtoxin, consumes virusfood.

* Fixes some issues.

* Adds changelog

code/modules/mob/living/simple_animal/hostile/hostile.dm

@@ -5,11 +5,4 @@
 	destroy_surroundings = 1
 	a_intent = I_HURT
 	hostile = 1
-
-
-/mob/living/simple_animal/hostile/Life()
-
-	. = ..()
-	if(!.)
-		walk(src, 0)
-		return 0
+	

code/modules/mob/living/simple_animal/simple_animal.dm

@@ -117,6 +117,8 @@
 			living_mob_list += src
 			stat = CONSCIOUS
 			density = 1
+		else
+			walk(src, 0)
 		return 0