This new version is full object and very easier than old version. At the moment i think that is more less finished.
3 classes exist at the moment, Tree is the main class and Item is the class for yours items and Button for add some action.
CC BY-NC-SA
You can use this module as you want, you can modify its code if you want and share it. You can also use this module into your softwares even commercial, but you can't sale this module even modified by yourself.