Updating readme file for WordPress 4.1

git-svn-id: https://plugins.svn.wordpress.org/cpanel-e-mail-manager/trunk@1048706 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updating readme file for WordPress 4.1

git-svn-id: https://plugins.svn.wordpress.org/cpanel-e-mail-manager/trunk@1048707 b8457f37-d9ea-0310-8a92-e5e31aec5664