system: Add sudo to '%base-packages'.

* gnu/system.scm (%base-packages): Add SUDO.
services: xorg: Run the window manager from a login shell.

This is a followup to 1d18d87, which fixes <http://bugs.gnu.org/19119>.

* gnu/services/xorg.scm (xinitrc)[builder]: Add 'exec-from-login-shell'
  procedure.  Use it instead of 'execl' when launching XSESSION, WMAKER,
  or RATPOISON.
vm: Use QEMU's standard VGA emulation by default.

* gnu/system/vm.scm (common-qemu-options): Add "-vga std".
system: Adjust 'grub.cfg' to work on systems with a separate /boot.

Fixes <http://bugs.gnu.org/19220>.
Reported by Nikita Karetnikov <nikita@karetnikov.org>.

* gnu/system/grub.scm (grub-configuration-file)[entry->gexp]: Add
  'search --file --set'.
  (grub-configuration-file)[builder]: Remove 'search.file'.
system: grub: Make sure the font and background image are always found.

* gnu/system/grub.scm (eye-candy): Add 'search --file --set'.
activation: Copy the account skeletons when creating the 'root' account.

* gnu/build/activation.scm (%skeleton-directory): New variable.
  (dot-or-dot-dot?, copy-account-skeletons): New procedure.
  (add-user): Use 'copy-account-skeletons'.
  (activate-etc): Use 'dot-or-dot-dot?'.
nls: Add French translation.
services: Make 'nscd-service' configurable; cache hosts/services by default.

Before that, as it was given an empty configuration file, nscd would
actually have all its caches disabled.

* gnu/services/base.scm (<nscd-configuration>, <nscd-cache>): New record
  types.
  (%nscd-default-caches, %nscd-default-configuration): New variables.
  (nscd.conf-file): New procedure.
  (nscd-service): Add 'config' parameter.  Use 'nscd.conf-file', and
  pass its result as the '-f' parameter of nscd.
* doc/guix.texi (Base Services): Update 'nscd-service' documentation
  accordingly.  Document 'nscd-configuration', 'nscd-cache',
  '%nscd-default-configuration', and '%nscd-default-caches'.
install: Use a low-memory nscd caching policy.

* gnu/system/install.scm (%nscd-minimal-caches): New variable.
  (installation-services): Use as 'nscd-service' argument.
gnu: Add xdotool.

* gnu/packages/xdisorg.scm (xdotool): New variable.
gnu: python-numpy-bootstrap: Reduce matrix size in failing test.

* gnu/packages/python.scm (python-numpy-bootstrap): Add phase
  'fix-failing-tests.
gnu: xfce4-panel: Support panel plugins from other packages.

* gnu/packages/patches/xfce4-panel-plugins.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/xfce.scm (xfce4-panel): Add the patch, and a
  native search path specification for X_XFCE4_LIB_DIRS.
gnu: Add xfce4-battery-plugin.

* gnu/packages/xfce.scm (xfce4-battery-plugin): New variable.
gnu: youtube-dl: Update to 2014.12.15.

* gnu/packages/video.scm (youtube-dl): Update to 2014.12.15.
gnu: Add vala.

* gnu/packages/gnome.scm (vala): New variable.
gnu: Add bullet.

* gnu/packages/game-development.scm: New file
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.
tests: Use 'test-assertm' for profiles.

* tests/profiles.scm (test-assertm): New macro.
  ("profile-derivation"): Use it instead of 'test-assert' +
  'run-with-store'.
profiles: Fix removal of the next-to-last item in a profile.

Fixes a bug whereby removing the next-to-last item in a profile would
lead to an obscure error, as shown at
<http://lists.gnu.org/archive/html/guix-devel/2014-12/msg00292.html>.
Reported by Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>.

* guix/profiles.scm (profile-derivation)[inputs]: Use (list info-dir
  "out") instead of just INFO-DIR.
gnu: icecat: Apply security updates for CVE-2014-{1587,1590,1592,1593,1594}.

* gnu/packages/patches/icecat-CVE-2014-1587-bug-1042567.patch,
  gnu/packages/patches/icecat-CVE-2014-1587-bug-1072847.patch,
  gnu/packages/patches/icecat-CVE-2014-1587-bug-1079729.patch,
  gnu/packages/patches/icecat-CVE-2014-1587-bug-1080312.patch,
  gnu/packages/patches/icecat-CVE-2014-1587-bug-1089207.patch,
  gnu/packages/patches/icecat-CVE-2014-1590.patch,
  gnu/packages/patches/icecat-CVE-2014-1592.patch,
  gnu/packages/patches/icecat-CVE-2014-1593.patch,
  gnu/packages/patches/icecat-CVE-2014-1594.patch: New files.
* gnu-system.am (dist_patch_DATA): Add them.
* gnu/packages/gnuzilla.scm (icecat): Add them.
gnu: lcms: Update to 2.6.

* gnu/packages/ghostscript.scm (lcms): Update to 2.6.