gnu: Add libtheora.

* gnu/packages/oggvorbis.scm (libtheora): New variable.

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

gnu: subversion, cmake: Clean up descriptions.

* gnu/packages/cmake.scm (cmake): Simplify the synopsis.
* gnu/packages/version-control.scm (subversion): Remove "open-source"
  from the description.

gnu: Add libgnome-keyring and Evince.

* gnu/packages/gnome.scm (libgnome-keyring, evince): New variables.

gnu: poppler: Build the poppler-glib bindings.

* gnu/packages/pdf.scm (poppler): Add Cairo and GLib as inputs.

gnu: Add dogtail.

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

gnu: kde: Add module and automoc4 package.

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

gnu: cmake: Update patch to work with new system.

* gnu/packages/patches/cmake-fix-tests.patch: Update to work with -p1.
* gnu/packages/cmake.scm (cmake): Drop patch flag -p0.

gnu: gsl: Update to 1.16.

* gnu/packages/maths.scm (gsl): Update to 1.16, disable parallel tests
    leading to a failure in vector.

gnu: gtk+: Update to 3.10.1.

* gnu/packages/gtk.scm (gtk+): Update to 3.10.1, drop no longer needed
    configure flag.

gnu: qemu-with-multiple-smb-shares: Fix typo.

* gnu/packages/qemu.scm (qemu/smb-shares): Turn 'patches' into a list.

gnu: Add gp2c.

* gnu/packages/algebra.scm (gp2c): New variable.

gnu: Add Qt 4.8.5.

* gnu/packages/qt.scm (qt-4): New variable.
* gnu/packages/patches/qt4-tests.patch: New file, patch dropping tests
    requiring a running X server.

gnu: Add Mercurial.

* gnu/packages/version-control.scm (mercurial): New variable.

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

gnu: Add GNU acct.

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

gnu: Valgrind: make it work with glibc 2.18.

* gnu/packages/patches/valgrind-glibc.patch: update it.

gnu: linux-libre-headers: Support cross-compilation.

* gnu/packages/linux.scm (linux-libre-headers):
  When (%current-target-system) is true, pass it as the argument to
  'build-phase'.  This fixes cross-compilation.
  Reported by Mark H. Weaver <mhw@netris.org>.

gnu: Add pavucontrol.

* gnu/packages/pulseaudio.scm (pavucontrol): New variable.

gnu: qt: Propagate input mesa.

* gnu/packages/qt.scm (qt): Propagate input mesa.

gnu: qt: Do not use special SSE etc. instructions.

* gnu/packages/qt.scm (qt): Add configure flags to disable machine specific
    instructions.

gnu: qt: Add input pulseaudio.

* gnu/packages/qt.scm (qt): Add input pulseaudio.