Hello,

Here's a wip patch for the website. It adds a new "download/latest"
page allowing to download the latest Guix System images from Cuirass.

I've merged all the required mechanisms in Guix and Cuirass, now most of
the remaining work is "cosmetic" (and that's not my cup of tea).

Anyway, the patch and a screenshot are attached, please tell me what you
think.

Thanks,

Mathieu