Installer update

[Ludovic Courtès]

Hello Guix!

I made changes to the installer so it’s almost ready as far as I’m
concerned.  It now displays language and territory names in the right
language.

If you give it a try, you can select “français” as the language and
check whether Julien did a good job.  ;-) Other languages are still
missing, but we’ll get there (translations are taken from the ‘guix’
package though, so we need to update it to get them.)

Besides, the installer allows you to select not just one of the
full-blown desktop environments but also the lightweight window
managers.  At this point it pretty much covers the desktop,
lightweight-desktop, and bare-bones examples that we had.

Things that are missing and would be nice to have, though I don’t think
these are blockers:

  • A dialog box to configure static networking.  I’m not sure how to do
    that with newt.  Mathieu?  :-)

  • Proper translations of timezones and XKB keyboard layout names.  As
    commented in commit 7cb7be17af77caa084c1b5ebf20748dd04f208fa, we
    don’t really have timezone translations, but I’m pretty sure Debian
    has something for these!

  • There’s a bug that I probably introduced in commit
    850ddf94e86a1711328e39872c7830ad6d5020b4: the installer crashes when
    one tries to jump back to the “Locale” step.  Mathieu, any ideas?

Testing and feedback welcome!

Ludo’.