added haddocks for L.Selective
added haddocks for L.Selective

Ignore-this: d29016f1261d0176634bb040fcc1836a

darcs-hash:20091002112720-a5338-4d23800e34986d1ee473ac299e794b6e4e0093d4

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