readme update

git-svn-id: https://plugins.svn.wordpress.org/nelichso-free-live-chat-software/trunk@1041748 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme update

git-svn-id: https://plugins.svn.wordpress.org/nelichso-free-live-chat-software/trunk@1041751 b8457f37-d9ea-0310-8a92-e5e31aec5664