refactor 'dir = ' into 'set_dir()'

This should have little/no gameplay effect right now, just paving the
 way for directional lights.
Replaced handle_rotation() on buckly things with this.

Signed-off-by: Mloc-Argent <colmohici@gmail.com>

code/game/objects/items/devices/chameleonproj.dm

@@ -95,7 +95,7 @@
 	icon = new_icon
 	icon_state = new_iconstate
 	overlays = new_overlays
-	dir = O.dir
+	set_dir(O.dir)
 	M.loc = src
 	master = C
 	master.active_dummy = src

code/game/objects/items/devices/floor_painter.dm

@@ -29,7 +29,7 @@
 
 				switch(tile_dir_mode)
 					if(1) // All directions accepted
-						F.dir = D
+						F.set_dir(D)
 						F.icon_state = mode
 					if(2) // Corner mode - diagonal directions converted CW around.
 						switch(D)
@@ -41,7 +41,7 @@
 								D = WEST
 							if(NORTHWEST)
 								D = NORTH
-						F.dir = D
+						F.set_dir(D)
 						F.icon_state = mode
 					if(3) // cardinal directions only. I've adjusted diagonals the same way the facing code does.
 						switch(D)
@@ -53,7 +53,7 @@
 								D = WEST
 							if(NORTHWEST)
 								D = WEST
-						F.dir = D
+						F.set_dir(D)
 						F.icon_state = mode
 					if(4) // floors.dmi icon_states "warningcorner" and "warnwhitecorner" are incorrect, this fixes it
 						var/D2
@@ -66,16 +66,16 @@
 								D2 = NORTH
 							if(NORTHWEST)
 								D2 = EAST
-						F.dir = D2
+						F.set_dir(D2)
 						F.icon_state = mode
 					if(5)
-						F.dir = 0
+						F.set_dir(0)
 						if(D == NORTH || D == SOUTH || D == NORTHEAST || D == SOUTHWEST)
 							F.icon_state = mode
 						else
 							F.icon_state = "[mode]_inv"
 			else
-				F.dir = 0
+				F.set_dir(0)
 				F.icon_state = mode
 		else
 			usr << "You can't paint that!"

code/game/objects/items/shooting_range.dm

@@ -116,7 +116,7 @@
 
 			if(Proj.damage >= 20 || istype(Proj, /obj/item/projectile/beam/practice))
 				bmark.icon_state = "scorch"
-				bmark.dir = pick(NORTH,SOUTH,EAST,WEST) // random scorch design
+				bmark.set_dir(pick(NORTH,SOUTH,EAST,WEST)) // random scorch design
 
 
 			else

code/game/objects/items/stacks/stack.dm

@@ -131,7 +131,7 @@
 		if (src.amount < R.req_amount*multiplier)
 			return
 		var/atom/O = new R.result_type( usr.loc )
-		O.dir = usr.dir
+		O.set_dir(usr.dir)
 		if (R.max_res_amount>1)
 			var/obj/item/stack/new_item = O
 			new_item.amount = R.res_amount*multiplier

code/game/objects/items/weapons/grenades/grenade.dm

@@ -35,7 +35,7 @@
 		spawn(det_time)
 			prime()
 			return
-		user.dir = get_dir(user, target)
+		user.set_dir(get_dir(user, target))
 		user.drop_item()
 		var/t = (isturf(target) ? target : target.loc)
 		walk_towards(src, t, 3)

code/game/objects/items/weapons/twohanded.dm

@@ -169,7 +169,7 @@
 	if((wielded) && prob(50))
 		spawn(0)
 			for(var/i in list(1,2,4,8,4,2,1,2,4,8,4,2))
-				user.dir = i
+				user.set_dir(i)
 				sleep(1)
 
 /obj/item/weapon/twohanded/dualsaber/IsShield()