branch master updated (7b9b203 -> d423d68)

[guix-commits]

civodul pushed a change to branch master
in repository guix.

      from  7b9b203   gnu: Add burp.
       new  499b166   guix system: Add 'delete-generations'.
       new  1e96983   guix system: List old generations from newest to oldest.
       new  d423d68   doc: Add a "Development" chapter.

The 3 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "adds" were already present in the repository and have only
been added to this reference.


Summary of changes:
 doc/guix.texi            | 1344 ++++++++++++++++++++++++----------------------
 guix/scripts/package.scm |    1 +
 guix/scripts/system.scm  |   20 +-
 3 files changed, 720 insertions(+), 645 deletions(-)