[MIRROR] Devil refactor+small revamp (#887)

* Devil refactor+small revamp

* Delete mind.dm.rej

* clean up rej

* Delete admin_investigate.dm.rej

* Delete mapping.dm.rej

* compile fix

code/datums/antagonists/antag_datum.dm

@@ -7,6 +7,7 @@
 
 	var/can_coexist_with_others = TRUE			//Whether or not the person will be able to have more than one datum
 	var/list/typecache_datum_blacklist = list()	//List of datums this type can't coexist with
+	var/delete_on_death = TRUE
 
 /datum/antagonist/New(datum/mind/new_owner)
 	typecache_datum_blacklist = typecacheof(typecache_datum_blacklist)
@@ -59,4 +60,4 @@
 	return
 
 /datum/antagonist/proc/farewell()
-	return
+	return