Police tape overhaul

General purge of copypaste code

Framework for easier adding of new tape types
Now you only need two sprites of roll and sprites of tape length (H and V)
Define them in police_tape.dm

To show it off, engineering tape added, passable by engineers and atmos techs

Last but not least - ability to lift the tape, allowing passage for pretty much everything.
Done by those with access, attack by empty hand on help intent.

code/defines/obj.dm

@@ -23,28 +23,28 @@
 
 	proc/initialize()
 
-/obj/item/policetaperoll
-	name = "police tape roll"
-	desc = "A roll of police tape used to block off crime scenes from the public."
+//Define all tape types in policetape.dm
+/obj/item/taperoll
+	name = "tape roll"
 	icon = 'policetape.dmi'
 	icon_state = "rollstart"
 	flags = FPRINT
 	w_class = 1.0
-	var/tapestartx = 0
-	var/tapestarty = 0
-	var/tapestartz = 0
-	var/tapeendx = 0
-	var/tapeendy = 0
-	var/tapeendz = 0
+	var
+		turf/start
+		turf/end
+		tape_type = /obj/item/tape
+		icon_base
 
-/obj/item/policetape
-	name = "police tape"
-	desc = "A length of police tape.  Do not cross."
+/obj/item/tape
+	name = "tape"
 	icon = 'policetape.dmi'
 	anchored = 1
 	density = 1
-	req_access = list(access_security)
+	var/icon_base
+/*
 
+*/
 /obj/structure/signpost
 	icon = 'stationobjs.dmi'
 	icon_state = "signpost"