Always install firmware packages.

Ie. removed check if ARCHIVE_AREAS non-free. We do always need non-free.
Merge branch 'master' of github.com:ypcs/digabi-live

* 'master' of github.com:ypcs/digabi-live:
  Added notes about vagrant ssh/VMware dhcp issues.
  Added support for building single stage(s) inside buildbox.