Fix line in changelog



git-svn-id: https://plugins.svn.wordpress.org/wordpress-seo/trunk@759975 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fix for two more lines in readme



git-svn-id: https://plugins.svn.wordpress.org/wordpress-seo/trunk@759980 b8457f37-d9ea-0310-8a92-e5e31aec5664