Remove the thing about co-running.

Changed wording.

README

@@ -2,32 +2,25 @@
 
 This is a small window manager for the X Window System written
 entirely with XCB, the straight X protocol binding to the C language.
-It doesn't use libX11, like most older window managers do.
+It doesn't use libX11 which most older window managers do.
 
 It's a traditional 'floating' window manager. It doesn't really do
 anything new to the user experience. It is pretty stupid, but can
 probably be useful for some people.
 
-Unlike most window managers, however, it is not a reparenting window
-manager. This means it might be able to run simultaneously with
-another window manager if you just want to get at the key bindings to
-manipulate windows. If this will work or not depends pretty much on
-what the other window manager thinks about stuff happening to windows
-without it looking.
-
 == Usage ==
 
 With the the default configuration, use it like this:
 
-  Mod1 key + mouse buttons:
+  Mod1 + mouse buttons:
 
     1 move
     2 raise
     3 resize
 
-  Mod2 key + key:
+  Mod2 + key:
 
-    r		raise
+    r		raise or lower (toggles)
     x 		maximize
     m 		maximize vertically
     h 		move left