gnu: Add Cython.

* gnu/packages/python.scm (cython, cython2): New variables.

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

gnu: Some cleanup based on lint checkers.

* gnu/packages/admin.scm, gnu/packages/aidc.scm, gnu/packages/algebra.scm,
  gnu/packages/apr.scm, gnu/packages/avahi.scm, gnu/packages/backup.scm,
  gnu/packages/base.scm, gnu/packages/calcurse.scm, gnu/packages/cdrom.scm,
  gnu/packages/check.scm, gnu/packages/compression.scm, gnu/packages/cook.scm,
  gnu/packages/crypto.scm, gnu/packages/cryptsetup.scm, gnu/packages/curl.scm,
  gnu/packages/cyrus-sasl.scm, gnu/packages/databases.scm,
  gnu/packages/doxygen.scm, gnu/packages/dwm.scm, gnu/packages/elf.scm,
  gnu/packages/emacs.scm, gnu/packages/feh.scm, gnu/packages/file.scm,
  gnu/packages/fish.scm, gnu/packages/flex.scm, gnu/packages/fltk.scm,
  gnu/packages/fontutils.scm, gnu/packages/games.scm, gnu/packages/gcal.scm,
  gnu/packages/gcc.scm, gnu/packages/geeqie.scm, gnu/packages/ghostscript.scm,
  gnu/packages/gimp.scm, gnu/packages/gl.scm, gnu/packages/glib.scm,
  gnu/packages/gnome.scm, gnu/packages/gnunet.scm, gnu/packages/gnupg.scm,
  gnu/packages/gperf.scm, gnu/packages/grub.scm, gnu/packages/gsasl.scm,
  gnu/packages/gtk.scm, gnu/packages/guile-wm.scm, gnu/packages/guile.scm,
  gnu/packages/hurd.scm, gnu/packages/icu4c.scm, gnu/packages/image.scm,
  gnu/packages/imagemagick.scm, gnu/packages/irssi.scm, gnu/packages/kde.scm,
  gnu/packages/libdaemon.scm, gnu/packages/libevent.scm,
  gnu/packages/libidn.scm, gnu/packages/libusb.scm, gnu/packages/linux.scm,
  gnu/packages/lout.scm, gnu/packages/lsh.scm, gnu/packages/lsof.scm,
  gnu/packages/lua.scm, gnu/packages/maths.scm, gnu/packages/mcrypt.scm,
  gnu/packages/mp3.scm, gnu/packages/netpbm.scm, gnu/packages/noweb.scm,
  gnu/packages/ocaml.scm, gnu/packages/openssl.scm, gnu/packages/pcre.scm,
  gnu/packages/pdf.scm, gnu/packages/pkg-config.scm,
  gnu/packages/pretty-print.scm, gnu/packages/python.scm, gnu/packages/qt.scm,
  gnu/packages/rsync.scm, gnu/packages/scheme.scm, gnu/packages/scrot.scm,
  gnu/packages/sdl.scm, gnu/packages/skribilo.scm, gnu/packages/ssh.scm,
  gnu/packages/stalonetray.scm, gnu/packages/tcl.scm, gnu/packages/tcsh.scm,
  gnu/packages/telephony.scm, gnu/packages/texlive.scm, gnu/packages/tor.scm,
  gnu/packages/valgrind.scm, gnu/packages/version-control.scm,
  gnu/packages/vim.scm, gnu/packages/vpn.scm, gnu/packages/w3m.scm,
  gnu/packages/web.scm, gnu/packages/wordnet.scm, gnu/packages/xiph.scm,
  gnu/packages/xml.scm, gnu/packages/xorg.scm, gnu/packages/zile.scm,
  gnu/packages/zip.scm, gnu/packages/zsh.scm [synopsis, description]: Adjust
  according to lint checkers.
* gnu/packages/fltk.scm (fltk)[source]: Wrap long line in uri.
* /gnu/packages/xiph.scm (libogg, libtheora, vorbis-tools)[source]: Same.

gnu: python2-pyicu: Update to 1.8.

* gnu/packages/python.scm (python2-pyicu): Update to 1.8.

Use #:prefix instead of #:renamer with 'symbol-prefix-proc'.

* gnu/packages/abiword.scm, gnu/packages/admin.scm, gnu/packages/aidc.scm,
  gnu/packages/backup.scm, gnu/packages/bittorrent.scm,
  gnu/packages/boost.scm, gnu/packages/compression.scm,
  gnu/packages/cryptsetup.scm, gnu/packages/curl.scm,
  gnu/packages/cyrus-sasl.scm, gnu/packages/dc.scm, gnu/packages/emacs.scm,
  gnu/packages/fonts.scm, gnu/packages/fontutils.scm, gnu/packages/geeqie.scm,
  gnu/packages/ghostscript.scm, gnu/packages/gimp.scm,
  gnu/packages/gkrellm.scm, gnu/packages/gl.scm, gnu/packages/glib.scm,
  gnu/packages/gnome.scm, gnu/packages/gnunet.scm, gnu/packages/gnupg.scm,
  gnu/packages/gnutls.scm, gnu/packages/gnuzilla.scm, gnu/packages/gsasl.scm,
  gnu/packages/gtk.scm, gnu/packages/gv.scm, gnu/packages/image.scm,
  gnu/packages/indent.scm, gnu/packages/inkscape.scm,
  gnu/packages/lesstif.scm, gnu/packages/links.scm, gnu/packages/lisp.scm,
  gnu/packages/lsh.scm, gnu/packages/lsof.scm, gnu/packages/maths.scm,
  gnu/packages/mp3.scm, gnu/packages/openssl.scm, gnu/packages/ots.scm,
  gnu/packages/pciutils.scm, gnu/packages/pcre.scm, gnu/packages/pdf.scm,
  gnu/packages/pulseaudio.scm, gnu/packages/python.scm, gnu/packages/slim.scm,
  gnu/packages/ssh.scm, gnu/packages/texlive.scm, gnu/packages/vim.scm,
  gnu/packages/vpn.scm, gnu/packages/web.scm, gnu/packages/wv.scm,
  gnu/packages/xiph.scm, gnu/packages/xml.scm, gnu/packages/xorg.scm,
  gnu/packages/yasm.scm, gnu/packages/zip.scm,
  guix/build/cmake-build-system.scm, guix/build/perl-build-system.scm,
  guix/build/python-build-system.scm, guix/download.scm: Replaces uses of
  #:renamer and 'symbol-prefix-proc' with #:prefix.

Merge branch 'master' into core-updates

Conflicts:
	gnu-system.am

gnu: Adjust synopses as recommended by 'guix lint'.

Remove leading articles and trailing periods in package synopses.

Merge branch 'master' into core-updates

Conflicts:
	gnu/packages/image.scm

gnu: Consolidate databases in (gnu packages databases).

* gnu/packages/databases.scm: New file, with the contents of the
  following deleted files.
* gnu/packages/mysql.scm, gnu/packages/postgresql.scm,
  gnu/packages/recutils.scm, gnu/packages/sqlite.scm,
  gnu/packages/bdb.scm: Remove.
* gnu-system.am (GNU_SYSTEM_MODULES): Adjust accordingly.
* gnu/packages/apl.scm, gnu/packages/dc.scm, gnu/packages/games.scm,
  gnu/packages/gnunet.scm, gnu/packages/linux.scm, gnu/packages/mail.scm,
  gnu/packages/mpd.scm, gnu/packages/nvi.scm, gnu/packages/openldap.scm,
  gnu/packages/package-management.scm, gnu/packages/python.scm,
  gnu/packages/qt.scm, gnu/packages/rdf.scm,
  gnu/packages/version-control.scm: Adjust to new module name.

Merge branch 'master' into core-updates

gnu: Add python-sphinx.

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

gnu: Add python-pygments.

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

gnu: Add python-docutils.

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

gnu: Add python-jinja2.

* gnu/packages/python.scm (python-jinja2, python2-jinja2): New variables.

gnu: Add python-markupsafe.

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

gnu: Add python-virtualenv.

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

gnu: Add python-itsdangerous.

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

gnu: Add python-oauthlib.

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

gnu: Add python-pyjwt.

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

gnu: Add python-discover.

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

gnu: Add python-coverage.

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