gnu: Add 'file-name' fields for github source tarballs without a name.

* gnu/packages/aarddict.scm (aarddict), gnu/packages/algebra.scm (arb),
  gnu/packages/audio.scm (jack-2, lvtk),
  gnu/packages/bioinformatics.scm (bedops, bedtools, bowtie),
  gnu/packages/game-development.scm (tiled),
  gnu/packages/games.scm (minetest-data, minetest, retroarch),
  gnu/packages/jrnl.scm (jrnl), gnu/packages/kde.scm (qjson),
  gnu/packages/libevent.scm (libuv), gnu/packages/linux.scm (pflask),
  gnu/packages/mail.scm (offlineimap, libetpan),
  gnu/packages/maths.scm (arpack-ng), gnu/packages/ninja.scm (ninja),
  gnu/packages/nutrition.scm (gourmet),
  gnu/packages/python.scm (python-cairocffi), gnu/packages/rdf.scm (lrdf),
  gnu/packages/ruby.scm (ruby-i18n), gnu/packages/sxiv.scm (sxiv): Add
  'file-name' field to origin.

gnu: Remove now unneeded 'localedef' invocations.

This is a followup to commit b0fd2bd.

* gnu/packages/gawk.scm (gawk)[arguments] <install-locales>: Add comment
  on why we leave this here.
* gnu/packages/guile.scm (guile-ncurses)[arguments]: Remove
  'install-locales' phase.
* gnu/packages/swig.scm (swig)[arguments]: Likewise.
* gnu/packages/python.scm (python-matplotlib): Remove 'LOCPATH' setting
  and 'localedef' invocation.
  (python-scipy): Likewise.

gnu: Remove now unneeded 'unpack' phases for unzip.

This is a followup to commit cd0385b.

* gnu/packages/bioinformatics.scm (hisat)[arguments]: Remove 'unpack'
  phase.
* gnu/packages/image.scm (freeimage): Likewise.
* gnu/packages/python.scm (python2-cssutils): Likewise.

Merge branch 'master' into core-updates

gnu: python-html5lib: Add propagated input.

* gnu/packages/python.scm (python-html5lib): Add propagated input python-six.
  (python2-html5lib): Add propagated input python2-six.

gnu: Add python2-six.

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

gnu: python2-oauthlib: Drop inherited fields.

* gnu/packages/python.scm (python2-oauthlib): Drop inherited fields.

gnu: python-scipy: install UTF-8 locale.

* gnu/packages/python.scm (python-scipy): Install en_US.UTF-8 locale in
  install-doc phase to avoid encoding error.

gnu: matplotlib: install UTF-8 locale.

* gnu/packages/python.scm (python-matplotlib): Install en_US.UTF-8 locale in
  install-doc phase to avoid encoding error.

gnu: python-setuptools: Update to 12.1.

*  gnu/packages/python.scm (python-setuptools, python2-setuptools):
     Update to 12.1.

gnu: Add python-netifaces.

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

gnu: Add python-cssselect.

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

gnu: Add python2-cssutils.

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

gnu: Add python2-pil.

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

gnu: python-apsw: Fix license.

* gnu/packages/python.scm (python-apsw)[license]: Change to
  LICENSE:ZLIB.

gnu: Add python-pillow.

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

gnu: Add python-lxml.

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

gnu: python: Prefix expat license by "license:" to avoid conflicts with
  expat from the xml module.

* gnu/packages/python.scm: Prefix expat license imported from
    (guix licenses).
* gnu/packages/python.scm (python-lockfile, python-mock, python-pysam,
    python-extras, python-mimeparse, python-py, python-pytest,
    python-scripttest, python-jsonschema, python-pyjwt, python-virtualenv,
    python-sphinx-rtd-theme, python-pyparsing, python-cffi, python-xcffib,
    python-html5lib, python-dbus): Adapt license field.

gnu: Add python-apsw.

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

gnu: Add Sphinx RTD theme.

* gnu/packages/python.scm (python-sphinx-rtd-theme, python2-sphinx-rtd-theme):
  New variables.