My dream to have 1 css/js file is crushed.

Sprockets doesn't entirely play well with path and different assets at
different places. Moreover, some stuff in sprockets-rails and sass-rails
seems to not even be working. Because debugging this would take fucking
ages and I'm not inclined to fix their shit (yet), I'm changing how
ecrire works. From now on, ecrire will have 2 css and 2 js files. One
default and one that the user can customize like it was previously
possible.

The default css is prism/admin menu. The other can @import compass and
use it.

Same goes for JS: Prism and admin shit, The user can provide his own js.