branch master updated (1b933e6 -> a51cbec)

[Ludovic Courtès]

civodul pushed a change to branch master
in repository guix.

      from  1b933e6   gnu: parted: Update to 3.2.
       new  8fb5837   Add (guix graph).
       new  923d846   graph: Add procedures to query a node's edges.
       new  a51cbec   refresh: Rewrite '--list-dependent' in terms of (guix 
graph).

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:
 Makefile.am              |    1 +
 guix/graph.scm           |  187 ++++++++++++++++++++++++++++++++++++++++++++++
 guix/scripts/graph.scm   |  100 +------------------------
 guix/scripts/refresh.scm |   71 ++++++++++++------
 guix/scripts/system.scm  |    1 +
 tests/graph.scm          |   39 +++++++++-
 6 files changed, 276 insertions(+), 123 deletions(-)
 create mode 100644 guix/graph.scm