let lookup-color accept xlib:color type

also let update-color-map use internal lookup-color (instead of xlib:lookup-color),
like the rest of stumpwm.  this allows xlib:colors everwhere!
update README to link to new wiki
Initial port to LispWorks 6.x.
Add support for LispWorks in 'mpd.lisp' module.
Fix package lock error in mpd module
Small spelling fix
Surfraw fails when there are local elvi.

Surfraw introduces global and local headers for elvi:

   GLOBAL ELVI:
  acronym         -- Look for acronyms
  definitions (www.acronymfinder.com)
  ...
   LOCAL ELVI:
  oed     -- Search OED (www.oed.com)

Surfraw.lisp isn't prepared for the local header and fails.
Have to quote things sent to the shell (fragile).
Adding some missing XF86 keys
Update stumpwm.texi.in
Added key mappings for monitor and keyboard brightness buttons.