gnu: python-isodate: Update to 0.5.4.

* gnu/packages/python.scm (python-isodate): Update to 0.5.4.

gnu: python-wsgi-intercept: Update to 1.1.2.

* gnu/packages/python.scm (python-wsgi-intercept): Update to 1.1.2.
[native-inputs]: Add python-six.

gnu: python-pytest-localserver: Update to 0.3.5.

* gnu/packages/python.scm (python-pytest-localserver): Update to 0.3.5.

gnu: python-requests-toolbelt: Update to 0.6.0.

* gnu/packages/python.scm (python-requests-toolbelt): Update to 0.6.0.

gnu: python-requests: Update to 2.9.1.

* gnu/packages/python.scm (python-requests): Update to 2.9.1.

gnu: python-wheel: Update to 0.29.0.

* gnu/packages/python.scm (python-wheel): Update to 0.29.0.

gnu: Add python-pastescript.

* gnu/packages/python.scm (python-pastescript, python2-pastescript):
  New variables.

gnu: Add python-paste.

* gnu/packages/python.scm (python-paste, python2-paste): New variables.
* gnu/packages/patches/python-paste-remove-timing-test.patch: New file.
* gnu/packages/patches/python-paste-remove-website-test.patch: New file.
* gnu-system.am (dist_patch_DATA): Add them.

Merge branch 'media-updates'

doc: Clarify the form of UUIDs we expect.

Fixes <http://bugs.gnu.org/22797>.
Reported by Alex Kost <alezost@gmail.com>.

* doc/guix.texi (File Systems): Clarify which UUIDs we're talking
about.

http-client: 'http-client/cached' uses unique cache file names.

* guix/http-client.scm (cache-file-for-uri): New procedure.
(http-fetch/cached): Use it.  Remove 'directory' variable.
[update-cache]: Make the 'dirname' of FILE.

http-client: 'http-fetch/cached' updates the cache atomically.

* guix/http-client.scm (http-fetch/cached)[update-cache]: Use
'with-atomic-file-output' instead of 'call-with-output-file'.

gnu: Add missing import in bioinformatics.scm.

This is a followup to 1baee94.

* gnu/packages/bioinformatics.scm: Add missing import.

guix system: Restore load path after running the activation script.

Fixes <http://bugs.gnu.org/22753>.
Reported by Mark H Weaver <mhw@netris.org>.

* guix/scripts/system.scm (save-load-path-excursion): New variable.
(upgrade-shepherd-services): Add comment about the issue.
(switch-to-system): Use 'save-load-path-excursion' around
'primitive-load' call.

store: Clarify documentation of 'valid-path?'.

* guix/store.scm (valid-path?): Improve docstring.
* doc/guix.texi (The Store): Update accordingly.

publish: Do not publish nars for invalid store items.

Before that, /nar requests could succeed if the requested store item
exists but is invalid (although such requests were unlikely because the
corresponding narinfo request would have failed.)

* guix/scripts/publish.scm (render-nar): Add 'store' parameter.  Use
'valid-path?' instead of 'file-exists?'.
(make-request-handler): Adjust 'render-nar' call accordingly.
* tests/publish.scm ("/nar/invalid"): New test.

gnu: Add kyotocabinet.

* gnu/packages/databases.scm (kyotocabinet): New variable.

gnu: Add libBigWig.

* gnu/packages/bioinformatics.scm (libbigwig): New variable.

gnu: guile-json: Update to 0.5.0.

* gnu/packages/guile.scm (guile-json): Update to 0.5.0.

Signed-off-by: Andreas Enge <andreas@enge.fr>

gnu: ardour: Update to 4.7.

* gnu/packages/audio.scm (ardour): Update to 4.7.