used greyspace as an example of how to use new footer code to add a plugin theme to the chip set. note that greyspace users may want to set userfixedtheme in config.php instead if the default available_themes are not welcome

git-svn-id: http://svn.montala.net/svn/resourcespace@4298 c08608d7-6e46-0410-86ca-f2a6f1370df5