update readme

git-svn-id: https://plugins.svn.wordpress.org/visual-website-editor/trunk@929475 b8457f37-d9ea-0310-8a92-e5e31aec5664
update

git-svn-id: https://plugins.svn.wordpress.org/visual-website-editor/trunk@929476 b8457f37-d9ea-0310-8a92-e5e31aec5664