#Issue 4570 : Enhanced userplane module.

Tracker link- http://atutor.ca/atutor/mantis/view.php?id=4570

I have checked the previous userplane module and it is working properly. 
Also I have implemented the following new APIs in the enhanced module:
 - Single sign on (http://www.userplane.com/docs/simple-sso/)
 - Presence Bar (http://www.userplane.com/docs/apps/presencebar)
 - Buddy List (http://www.userplane.com/docs/apps/buddylist)
 - WebChat Lite (http://www.userplane.com/docs/apps/webchatlite)

Some of the improved features are:
- Single sign on
- A general discussion room which can be accessed outside any course.
- Course Discussion Room - A room provided inside every course.
- Group Chat which allows members of a group to interact with each other.
- Side block which enables you to chat with online users.
- Buddy Chat which provides a list of online friends (contacts in ATutor) giving a FB chat appearance.

For configuration and installation please follow the instructions listed in the README file.