Readme updated.

git-svn-id: https://plugins.svn.wordpress.org/cleantalk-spam-protect/trunk@892130 b8457f37-d9ea-0310-8a92-e5e31aec5664
Tags fixed.

git-svn-id: https://plugins.svn.wordpress.org/cleantalk-spam-protect/trunk@892131 b8457f37-d9ea-0310-8a92-e5e31aec5664