Decoration: remove mouse resize and more
Decoration: remove mouse resize and more

- since mouse resize is not related to decoration, I removed the code
  from here. Mouse resize will be handled by a separated layout
  modifier (in a separated module)
- now also stacked decoration will be removed (I separated insert_dwr
  from remove_stacked)

darcs-hash:20080212165306-32816-1272c6e2d3aaaecb389a6e655f22d35c21a40168

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