updates to readme

git-svn-id: https://plugins.svn.wordpress.org/the-casengo-chat-widget/trunk@846232 b8457f37-d9ea-0310-8a92-e5e31aec5664
updates to readme

git-svn-id: https://plugins.svn.wordpress.org/the-casengo-chat-widget/trunk@846235 b8457f37-d9ea-0310-8a92-e5e31aec5664