Sorry for the delay.
My problem about releasing the sources, is that a website using them to build a website closed to cucumis.org, is a direct challenger

We don't need challengers
Cucumis sources are not available.
Maybe I would release the sources one day to get help on the developement but for now there is to many things to do. The projects documentation ius closed to 0. Maybe one day, when it's more stable...