gnu: pulseaudio: Add patch for 'volume-test'; re-enable tests.

* gnu/packages/patches/pulseaudio-volume-test.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/pulseaudio.scm (pulseaudio): Use it.  Remove
  #:tests? #t.

gnu: games: Add new package gnubg

* gnu/packages/games.scm (gnubg): New variable

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

gnu: libgcrypt: Add "debug" output.

* gnu/packages/gnupg.scm (libgcrypt): Add 'outputs' field.

gnu: mesa: Move out of xorg.scm and into gl.scm

* gnu/packages/xorg.scm (mesa): Move to...
* gnu/packages/gl.scm (mesa): ... here.  New variable.
* gnu/packages/gnome.scm, gnu/packages/gnuzilla.scm,
  gnu/packages/qemu.scm, gnu/packages/qt.scm: Adjust accordingly.

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

gnu: automake: Upgrade to 1.14.1.

* gnu/packages/autotools.scm (automake): Upgrade to 1.14.1.

gnu: gdbm: Upgrade to 1.11.

* gnu/packages/gdbm.scm (gdbm): Upgrade to 1.11.

gnu: games: New module

* gnu/packages/games.scm (gnubik): New variable

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

gnu: gnome: Add new package gtkglext

* gnu/packages/gnome.scm (gtkglext): New variable.
* gnu/packages/patches/gtkglext-disable-disable-deprecated.patch,
  gnu/packages/patches/gtkglext-remove-pangox-dependency.patch: New
  files.
* gnu-system.am (dist_patch_DATA): Add them.

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

gnu: python: Update to 3.3.3.

* gnu/packages/python.scm (python): Update to 3.3.3.

gnu: python-2: Update to 2.7.6.

* gnu/packages/python.scm (python-2): Update to 2.7.6.

gnu: parallel: Update to 20131122.

* gnu/packages/parallel.scm (parallel): Update to 20131122.

gnu: xorriso: Update to 1.3.4.

* gnu/packages/cdrom.scm (xorriso): Update to 1.3.4.

gnu: libcdio: Update to 0.92.

* gnu/packages/cdrom.scm (libcdio): Update to 0.92.

gnu: libextractor: Update to 1.3.

* gnu/packages/gnunet.scm (libextractor): Update to 1.3.

gnu: vim: Update to 7.4.

* gnu/packages/vim.scm (vim): Update to 7.4.

Factorize package search between 'guix package' and 'guix build'.

* guix/scripts/package.scm (newest-available-packages): Remove.
  (find-best-packages-by-name): Move to...
* gnu/packages.scm (find-best-packages-by-name): ... here.
  (find-newest-available-packages): Memoize.
* guix/scripts/build.scm (specification->package): New procedure,
  formerly called 'find-package' within 'guix-build'.
  (guix-build): Adjust accordingly.

gnu: xf86-video-vmware: Add input xorg-server.

* gnu/packages/xorg.scm (xf86-video-vmware): Add input xorg-server.

gnu: iso-codes: Update to 3.49.

* gnu/packages/iso-codes.scm (iso-codes): Update to 3.49.

gnu: shishi: Use libgcrypt-1.5.

* gnu/packages/shishi.scm (shishi): Use input libgcrypt-1.5 instead of 1.6.

gnu: libgcrypt: Make old version 1.5.3 public.

* gnu/packages/gnupg.scm (libgcrypt-1.5): New variable.
* gnu/packages/ssh.scm (libssh): Use libgcrypt-1.5 instead of defining it
    ad-hoc.