Have a custom thumbnail for each bill

[mdamien]

So it's easier to share the pages, example:

(like it's done on NosDéputés / NosSénateurs)

We can freeload on thumbmail.ws in the meantime: https://thumbnail.ws/get/thumbnail/?apikey=ab45a17344aa033247137cf2d457fc39ee4e7e16a464&url=www.lafabriquedelaloi.fr/articles.html?loi=ppl17-558&width=400&mobile=false

Or https://manet.herokuapp.com/

Manet render seems a bit broken, we can just extract the viz instead: https://manet.herokuapp.com/?url=https%3A%2F%2Fwww.lafabriquedelaloi.fr%2Farticles.html%3Floi%3Dppl17-558&delay=2000&format=jpg&width=2000&zoom=0.8&selector=%23viz&selectorCrop=true&engine=phantomjs