Zurb Foundation skeleton

added my zurb foundation skeleton in the experimental section

It is just an initial commit, it works and compile the sass source of foundation (but livereloads do not always work and it is quite slow to compile, but i would like to avoid to use a static version of zurb foundation because of the possibility to change its settings during the work).

I am not an expert of docpad, but i think it would be adviceable to add some page and blog post generation using docpad api.