gnu: recutils: Upgrade to 1.7.

* gnu/packages/recutils.scm (recutils): Upgrade to 1.7.
  Add 'arguments' field.

gnu: Add cursynth

* gnu/packages/cursynth.scm: New file
* gnu-system.am (GNU_SYSTEM_MODULES): Add it

gnu: autotools: Add Autoconf 2.68; turn 'autoconf-wrapper' into a procedure.

* gnu/packages/autotools.scm (autoconf-2.68): New variable.
  (autoconf-wrapper): Turn into a procedure.  Turn comment into a
  docstring.
  (automake): Adjust accordingly.

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

gnu: tor: Upgrade to 0.2.4.21.

* gnu/packages/tor.scm (tor): Upgrade to 0.2.4.21.

gnu: Provide single-precision fftw library for pulseaudio

* gnu/packages/algebra.scm (fftwf): New variable
* gnu/packages/pulseaudio.scm (pulseaudio): Use it

gnu: cmake: Install man pages and docs in share/{man,doc}.

* gnu/packages/cmake.scm (cmake): Pass --mandir and --docdir to configure.
  Rewrite the code that selects the first two components of the version.

gnu: flac: Install man pages in share/man.

* gnu/packages/xiph.scm (flac): Add --mandir configure flag.

gnu: libvorbis: disable parallel tests

* gnu/packages/xiph.scm (libvorbis): disable parallel tests

gnu: openssh: Upgrade to 6.6p1.

* gnu/packages/ssh.scm (openssh): Upgrade to 6.6p1.

gnu: tzdata: Upgrade to 2014a.

gnu: lynx: Upgrade to 2.8.8rel.2.

* gnu/packages/lynx.scm (lynx): Upgrade to 2.8.8rel.2.

gnu: bc: Install docs in share/man and share/info.

* gnu/packages/algebra.scm (bc): Pass --mandir and --infodir to configure.

gnu: unzip: Install man pages in share/man.

* gnu/packages/zip.scm (unzip): Substitute /share/man/ for /man/ in Makefile.

gnu: screen: Install docs in share/man and share/info.

* gnu/packages/screen.scm (screen): Add --mandir and --infodir
  configure flags.

gnu: netcat: Install docs in share/man and share/info.

* gnu/packages/admin.scm (netcat): Add --mandir and --infodir
  configure flags.

gnu: xterm: Upgrade to 303.

* gnu/packages/xorg.scm (xterm): Upgrade to 303.

gnu: imagemagick: Upgrade to 6.8.8-8.

* gnu/packages/imagemagick.scm (imagemagick): Upgrade to 6.8.8-8.

gnu: Add Window Maker.

* gnu/packages/gnustep.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

gnu: libxft: Propagate Freetype and Fontconfig.

* gnu/packages/xorg.scm (libxft): Move Freetype and Fontconfig from
  'inputs' to 'propagated-inputs'.

gnu: luajit: Update to 2.0.3.

* gnu/packages/lua.scm (luajit): Update to 2.0.3.