delete .css

git-svn-id: https://plugins.svn.wordpress.org/facebook-fanbox-popup/trunk@1005469 b8457f37-d9ea-0310-8a92-e5e31aec5664
add .css

git-svn-id: https://plugins.svn.wordpress.org/facebook-fanbox-popup/trunk@1005470 b8457f37-d9ea-0310-8a92-e5e31aec5664