branch master updated (581176c -> f535dcb)

[David Thompson]

davexunit pushed a change to branch master
in repository guix.

      from  581176c   gnu: youtube-dl: Upgrade to 2015.10.24.
       new  f535dcb   scripts: environment: Add --container option.

The 1 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
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Summary of changes:
 Makefile.am                         |    1 +
 doc/guix.texi                       |   56 +++++++
 guix/scripts/environment.scm        |  276 +++++++++++++++++++++++++++++------
 guix/scripts/system.scm             |   13 --
 guix/ui.scm                         |   19 +++
 tests/guix-environment-container.sh |   75 ++++++++++
 6 files changed, 385 insertions(+), 55 deletions(-)
 create mode 100644 tests/guix-environment-container.sh