move W -> WMonad

Main.hs

@@ -25,7 +25,7 @@ import Graphics.X11.Xlib.Extras
 
 import Control.Monad.State
 
-import W
+import WMonad
 import qualified StackSet as W
 
 --

WMonad.hs

@@ -14,7 +14,7 @@
 -- manager state, and support routines.
 --
 
-module W where
+module WMonad where
 
 import StackSet