gnu: python-parsedatetime: Update to 2.4.

* gnu/packages/python.scm (python-parsedatetime, python2-parsedatetime):
Update to 2.4.

gnu: python-icalendar: Update to 3.11.5.

* gnu/packages/python.scm (python-icalendar): Update to 3.11.5.

gnu: python-pylint: Update to 1.7.2.

* gnu/packages/python.scm (python-pylint): Update to 1.7.2.
[native-inputs]: Add PYTHON-PYTEST and PYTHON-PYTEST-RUNNER.

gnu: python-astroid: Update to 1.5.3.

* gnu/packages/python.scm (python-astroid): Update to 1.5.3.
[properties]: Declare python2 variant.
(python2-astroid)[propagated-inputs]: Add PYTHON2-BACKPORTS-FUNCTOOLS-LRU-CACHE,
PYTHON2-ENUM34 and PYTHON2-SINGLEDISPATCH.

gnu: python-pyopenssl: Update to 17.1.0.

* gnu/packages/python.scm (python-pyopenssl, python2-pyopenssl): Update to 17.1.0.
[source]: Remove patch.
[native-inputs]: Add PYTHON-PRETEND.
[arguments]<#:phases>: Disable the network test here instead of via a patch.
Also disable one new test.
* gnu/packages/patches/python-pyopenssl-skip-network-test.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu: python-cryptography: Update to 1.9.

* gnu/packages/python.scm (python-cryptography-vectors): Update to 1.9.
(python-cryptography): Update to 1.9.
[propagated-inputs]: Remove PYTHON-PACKAGING.

gnu: python-cffi: Update to 1.10.0.

* gnu/packages/python.scm (python-cffi): Update to 1.10.0.
[arguments]<#:phases>: Patch distutils.ccompiler call to use "gcc". Patch
another hard-coded cc invocation. Adjust `py.test` invocation per README.

gnu: python-cffi: Really enable tests.

* gnu/packages/python.scm (python-cffi, python2-cffi)[arguments]: Replace
'check' phase with custom expression. Change to 'modify-phases' syntax.

gnu: python-vobject: Update to 0.9.5.

* gnu/packages/python.scm (python-vobject, python2-vobject): Update to 0.9.5.

gnu: snakemake: Fix cluster execution.

* gnu/packages/python.scm (snakemake)[arguments]: Add build phase
"call-wrapper-not-wrapped-snakemake".

gnu: Add python-rencode.

* gnu/packages/python.scm (python-rencode): New variable.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

gnu: Add python2-pyopengl.

* gnu/packages/python.scm (python2-pyopengl): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu: Add python-uniseg.

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

gnu: python-drmaa: Update source URL.

* gnu/packages/python.scm (python-drmaa)[source]: Use pypi-uri.

gnu: python-pycodestyle: Update to 2.3.1.

* gnu/packages/python.scm (python-pycodestyle): Update to 2.3.1.

gnu: Remove unused python-flake8-2.2.4.

* gnu/packages/python.scm (python-flake8-2.2.4): Remove variable.

gnu: python-eventlet: Skip failing test phase.

* gnu/packages/python.scm (python-eventlet)[arguments]: Disable tests.

gnu: python-vobject: Update to 0.9.4.1.

* gnu/packages/python.scm (python-vobject): Update to 0.9.4.1.

gnu: Add python-regex.

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

gnu: Move contents of zip module into compression module.

* gnu/packages/zip.scm (zip, unzip, zziplib, perl-zip): Move to...
* gnu/packages/compression.scm: ...here.
* gnu/packages/zip.scm: Delete file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Unregister deleted file.
* po/packages/POTFILES.in: Unregister deleted file.
* gnu/packages/{audio, avr, bioinformatics, busybox, cdrom, ci, compression,
docbook, documentation, fonts, fpga, game-development, games, gl, gnome,
gnuzilla, graphics, guile, haskell, image, java, kodi, ldc, libreoffice,
markup, maths, mc, monitoring, music, php, pretty-print, python, scheme,
smalltalk, statistics, synergy, tex, textutils, video, web-browsers, xml,
zip}.scm, guix/build-system/{ant, font}.scm, guix/{download, packages}.scm:
Adapt module import.