Some assembly fixes and tidying up. Plus, improved infrared emitters, with new sprites by Pewtershmitz!

Removed the infra sensor, as it was buggy, and, to be perfectly honest, utterly pointless.
Slightly improved and moved dice code.

Fixes issue 366.
Fixes issue 317.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4555 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/assembly/helpers.dm

@@ -0,0 +1,44 @@
+/proc/isassembly(O)
+	if(istype(O, /obj/item/device/assembly))
+		return 1
+	return 0
+
+/proc/isigniter(O)
+	if(istype(O, /obj/item/device/assembly/igniter))
+		return 1
+	return 0
+
+/proc/isinfared(O)
+	if(istype(O, /obj/item/device/assembly/infra))
+		return 1
+	return 0
+
+/proc/isprox(O)
+	if(istype(O, /obj/item/device/assembly/prox_sensor))
+		return 1
+	return 0
+
+/proc/issignaler(O)
+	if(istype(O, /obj/item/device/assembly/signaler))
+		return 1
+	return 0
+
+/proc/istimer(O)
+	if(istype(O, /obj/item/device/assembly/timer))
+		return 1
+	return 0
+
+/*
+Name:	IsSpecialAssembly
+Desc:	If true is an object that can be attached to an assembly holder but is a special thing like a plasma can or door
+*/
+
+/obj/proc/IsSpecialAssembly()
+	return 0
+
+/*
+Name:	IsAssemblyHolder
+Desc:	If true is an object that can hold an assemblyholder object
+*/
+/obj/proc/IsAssemblyHolder()
+	return 0