3.1.5 release

git-svn-id: https://plugins.svn.wordpress.org/really-simple-facebook-twitter-share-buttons/trunk@932950 b8457f37-d9ea-0310-8a92-e5e31aec5664
minor

git-svn-id: https://plugins.svn.wordpress.org/really-simple-facebook-twitter-share-buttons/trunk@932952 b8457f37-d9ea-0310-8a92-e5e31aec5664