branch master updated (f7283db -> 8885691)

[Ludovic Courtès]

civodul pushed a change to branch master
in repository guix.

      from  f7283db   gnu: Add BioPerl.
       new  c2b8467   gexp: Add 'lower-object'.
       new  12e5b26   build: Do not build (guix build syscalls) if 'mount' is 
missing from libc.
       new  8885691   Add '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:
 .gitignore                                |    4 +
 Makefile.am                               |   18 ++-
 configure.ac                              |    5 +
 doc.am                                    |   23 +-
 doc/guix.texi                             |  124 ++++++++-
 doc/images/coreutils-bag-graph.dot        |  213 ++++++++++++++
 doc/images/coreutils-graph.dot            |   23 ++
 guix/gexp.scm                             |   31 ++-
 guix/scripts/graph.scm                    |  426 +++++++++++++++++++++++++++++
 m4/guix.m4                                |   13 +
 tests/gexp.scm                            |    7 +
 tests/graph.scm                           |  193 +++++++++++++
 tests/{guix-download.sh => guix-graph.sh} |   26 +-
 13 files changed, 1072 insertions(+), 34 deletions(-)
 create mode 100644 doc/images/coreutils-bag-graph.dot
 create mode 100644 doc/images/coreutils-graph.dot
 create mode 100644 guix/scripts/graph.scm
 create mode 100644 tests/graph.scm
 copy tests/{guix-download.sh => guix-graph.sh} (63%)