version 4.0

git-svn-id: https://plugins.svn.wordpress.org/facebook-comments-master/trunk@789224 b8457f37-d9ea-0310-8a92-e5e31aec5664
wp 3.7 ready

git-svn-id: https://plugins.svn.wordpress.org/facebook-comments-master/trunk@793789 b8457f37-d9ea-0310-8a92-e5e31aec5664