Count user (Add user like a moodle1.9)

This plug-in is the block which counts the number assigned to the roll within a course like moodle1.9.
Only admin can be used.
Version 1.0
This plug-in is the block which counts the number assigned to the roll within a course like moodle1.9.
Only an administrator can use.
When it installs in the front page of moodle, this block considers the load of a server and a total button is not displayed.
Version 1.1
You can be a registered user on the screen , such as moodle1.9 When you click the name of the role.