Just a quick comment:
This plugin is not going to work in Moodle 2.4 due to technical changes in the main Moodle's javascript library:
See http://tracker.moodle.org/browse/MDL-34741 for more technical information
If you are interested in having the plugin available for 2.4 and you have funding, please contact me using the forum or a private message.
If you have programming skills and you want to contribute, please fork the github repository and make the plugin working in 2.4