Util/Search.hs: a few updates/fixes
Util/Search.hs: a few updates/fixes

  * fix shadowing warning (ghc 6.8.2 complains)
  * export a few more of the functions
  * re-de-obfuscate generated URLs by not escaping alphanumerics or punct.

darcs-hash:20071217222930-bd4d7-6b3809c471754bb03ad6f3658f9e8c7c7d2865a2

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