branch master updated (b28187c -> 50f4ea1)

[Ludovic Courtès]

civodul pushed a change to branch master
in repository guix.

      from  b28187c   Revert "gnu: bc: Update to 1.07."
       new  79f912c   Revert "gnu: openexr: Add IlmBase include sub-directory 
to 'OpenEXR.pc'."
       new  f37f2b8   packages: Add 'package-mapping' and base 
'package-input-rewriting' on it.
       new  1618006   build-system/python: 'package-with-explicit-python' uses 
'package-mapping'.
       new  a0b87ef   profiles: Generate database file for man pages.
       new  31f1f59   doc: Add "Documentation" section.
       new  50f4ea1   environment: Deal with single-entry search paths.

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                | 76 +++++++++++++++++++++++++++++++++++++++
 gnu/packages/graphics.scm    | 16 +--------
 guix/build-system/python.scm | 85 +++++++++++++++++++-------------------------
 guix/packages.scm            | 56 +++++++++++++++++++----------
 guix/profiles.scm            | 79 ++++++++++++++++++++++++++++++++++++++++
 guix/scripts/environment.scm |  4 ++-
 tests/packages.scm           | 27 ++++++++++++++
 7 files changed, 260 insertions(+), 83 deletions(-)