change plugin readme

git-svn-id: https://plugins.svn.wordpress.org/profit-button/trunk@848762 b8457f37-d9ea-0310-8a92-e5e31aec5664
change plugin readme

git-svn-id: https://plugins.svn.wordpress.org/profit-button/trunk@848763 b8457f37-d9ea-0310-8a92-e5e31aec5664
change plugin readme

git-svn-id: https://plugins.svn.wordpress.org/profit-button/trunk@848764 b8457f37-d9ea-0310-8a92-e5e31aec5664