Added Terms of Service, updated compatibility

git-svn-id: https://plugins.svn.wordpress.org/related-posts-by-zemanta/trunk@986164 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated description

git-svn-id: https://plugins.svn.wordpress.org/related-posts-by-zemanta/trunk@986165 b8457f37-d9ea-0310-8a92-e5e31aec5664