dev: add site/ app.

Signed-off-by: Raphaël Barrois <raphael.barrois@polytechnique.org>
Improve templates.

Signed-off-by: Raphaël Barrois <raphael.barrois@polytechnique.org>
Include .css files.

Signed-off-by: Raphaël Barrois <raphael.barrois@polytechnique.org>
Improve views/ documentation.

Signed-off-by: Raphaël Barrois <raphael.barrois@polytechnique.org>