replace readme

git-svn-id: https://plugins.svn.wordpress.org/cm-onboarding/trunk@1046992 b8457f37-d9ea-0310-8a92-e5e31aec5664
update read

git-svn-id: https://plugins.svn.wordpress.org/cm-onboarding/trunk@1046994 b8457f37-d9ea-0310-8a92-e5e31aec5664