New readme.txt

git-svn-id: https://plugins.svn.wordpress.org/wstoolsnl-chat/trunk@852283 b8457f37-d9ea-0310-8a92-e5e31aec5664
new readme.txt

git-svn-id: https://plugins.svn.wordpress.org/wstoolsnl-chat/trunk@852285 b8457f37-d9ea-0310-8a92-e5e31aec5664