Bug#592127: document steps to make compiz persistent

[dann frazier <dannf@debian.org>]

Package: compiz
Version: 0.8.4-4
Severity: wishlist

README.Debian describes how to use compiz --replace to start compiz,
but it does not provide any steps explaining how to make it
persistent. This information is available on the wiki:
  http://wiki.debian.org/Compiz

Could we also include that info in README.Debian?
-- 
dann frazier