UrgencyHook: got rid of the need for instances to know about suppressWhen
UrgencyHook: got rid of the need for instances to know about suppressWhen

This changes the API a little bit, but that's what you get for using a day-old feature from darcs.

darcs-hash:20080514072217-78224-b625ee9ab6b9ff69bd1e0cc68f0a15b8724e3a06

yzhou61/xmonad-contrib,yzhou61/xmonad-contrib,yzhou61/xmonad-contrib