[Cuirass] Build details

[Ricardo Wurmus]

Hi Guix,

Cuirass now handles URLs of the pattern /build/<id>/details to show you
details of the selected build.  It’s not much at this point and it could
be prettier (e.g. to display the duration in human-readable form, not
just in seconds) and show more information (such as dependencies), but
it’s a start.

Here’s an example so you don’t have to go look for it:

    https://ci.guix.gnu.org/build/1399809/details

-- 
Ricardo