RnD & Cat fixes (#1913)

changes:

bugfix: "Fixed an issue where some objects could not be deconstructed with RnD."
bugfix: "Helmet lights now actually display the powered-on sprite."
bugfix: "Cats on heads no longer magically turn invisible."
bugfix: "Cyborgs' portable destructive analyzer can no longer steal intercoms or the captain's safe."
imageadd: "Duffle (duffel?) bags now have in-hand sprites."
Fixes #1158 
Fixes #1662

code/game/objects/items/weapons/material/knives.dm

@@ -58,7 +58,7 @@
 	edge = 1
 	force_divisor = 0.15 // 9 when wielded with hardness 60 (steel)
 	matter = list(DEFAULT_WALL_MATERIAL = 12000)
-	origin_tech = "materials=1"
+	origin_tech = list(TECH_MATERIAL = 1)
 	attack_verb = list("slashed", "stabbed", "sliced", "torn", "ripped", "diced", "cut")
 	unbreakable = 1
 

code/game/objects/items/weapons/material/misc.dm

@@ -18,7 +18,7 @@
 	w_class = 2
 	sharp = 1
 	edge = 1
-	origin_tech = "materials=2;combat=1"
+	origin_tech = list(TECH_MATERIAL = 2, TECH_COMBAT = 1)
 	attack_verb = list("chopped", "torn", "cut")
 	applies_material_colour = 0
 
@@ -61,5 +61,5 @@
 	throw_range = 3
 	w_class = 4
 	slot_flags = SLOT_BACK
-	origin_tech = "materials=2;combat=2"
+	origin_tech = list(TECH_MATERIAL = 2, TECH_COMBAT = 2)
 	attack_verb = list("chopped", "sliced", "cut", "reaped")