upgrade and compatible with WP4.0

git-svn-id: https://plugins.svn.wordpress.org/starbox/trunk@982198 b8457f37-d9ea-0310-8a92-e5e31aec5664
upgrade the readme description

git-svn-id: https://plugins.svn.wordpress.org/starbox/trunk@982207 b8457f37-d9ea-0310-8a92-e5e31aec5664