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/modules/flufftext/Hallucination.dm

@@ -295,7 +295,7 @@ proc/check_panel(mob/M)
 				collapse()
 				continue
 			if(get_dist(src,my_target) > 1)
-				src.dir = get_dir(src,my_target)
+				src.set_dir(get_dir(src,my_target))
 				step_towards(src,my_target)
 				updateimage()
 			else