branch master updated (69851c5 -> 6726282)

[Ludovic Courtès]

civodul pushed a change to branch master
in repository guix.

      from  69851c5   gnu: openblas: Update to 0.2.15.
       new  122c3a1   system: grub: Let GRUB choose the best graphics mode.
       new  136787c   doc: Mention Nix in the intro.
       new  b416aad   gnu: Move gdbm to (gnu packages databases).
       new  362f496   gnu: Add libchop.
       new  e502bf8   system: File systems depend on their corresponding device 
mappings.
       new  6726282   services: Add screen-locker service.

The 6 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               |   22 +++++++++++++++--
 gnu-system.am               |    1 -
 gnu/packages/avahi.scm      |    2 +-
 gnu/packages/backup.scm     |   44 ++++++++++++++++++++++++++++++++++
 gnu/packages/cyrus-sasl.scm |    4 +-
 gnu/packages/databases.scm  |   22 +++++++++++++++++
 gnu/packages/gdbm.scm       |   46 ------------------------------------
 gnu/packages/guile.scm      |    2 +-
 gnu/packages/mail.scm       |    2 -
 gnu/packages/man.scm        |    2 +-
 gnu/packages/pulseaudio.scm |    2 +-
 gnu/packages/python.scm     |    1 -
 gnu/packages/ruby.scm       |    3 +-
 gnu/packages/sawfish.scm    |    2 +-
 gnu/services/base.scm       |   14 ++++++++++-
 gnu/services/desktop.scm    |    6 ++++
 gnu/services/xorg.scm       |   55 ++++++++++++++++++++++++++++++++++++++++++-
 gnu/system.scm              |   23 ++++++++----------
 gnu/system/file-systems.scm |    5 +--
 gnu/system/grub.scm         |    2 +-
 gnu/system/linux.scm        |    3 +-
 21 files changed, 180 insertions(+), 83 deletions(-)
 delete mode 100644 gnu/packages/gdbm.scm