Package Builder #3 : CSS & SCSS on the fly on the server side

I make a builder on the fly on the server side.

The CSS & SCSS files are generated using a WebService called by url ```/build/[css|scss]?menu=xbutterfly&grid=collapse...```

I changed the markup in __builder.html__ by using some small declarations like __menu=xbutterfly__ which means
- " you would like transform from menu to xbutterfly "

All dependencies files needed are declared in __deps.json__ file which defines the dependencies between the SCSS files.

If we find naming conventions we could simplify the dependencies declaration but it will be less flexible.