Started because of a question from a user on marionettejs gitter channel. Fixed one thing on jsfiddle with him, but noticed a lot of missusage of Marionette & Backbone.
So I hope this example will help a lot of people to understand CompositeView working as a tree / leaf helper but also app, rootView, regions, ...
just git clone this repo & then
git clone https://github.com/JSteunou/m-guide-compositeview
cd m-guide-compositeview
bower install
python -m SimpleHTTPServeropen up http://127.0.0.1:8000