Restructure the data tree a bit.

In the macros directory some more generic macros will be defined, the
_initial.cfg should be loaded first. The engine doesn't enforce that yet but
probably esr will add that feature. (The odds of it not being loaded first is
probably theoretical.)

data/gui/default.cfg

@@ -15,7 +15,7 @@
 		double_click_time = 500
 	[/settings]
 
-{gui/default/macros.cfg}
+{gui/default/macros/}
 {gui/default/window/}
 {gui/default/widget/}