[xmonad] announce: XMonad.Util.WindowProperties

Just pushed new module: XMonad.Util.WindowProperties. This module allows to specify window properties, such as title, classname or resource, and to check them. In contrast to ManageHook properties, these are instances of Show and Read, so they can be used in layout definitions etc. It was a part of IM layout before, and now I hope it will help Braden with his PlainConfig. -- Roman I. Cheplyaka (aka Feuerbach @ IRC)