gnu: ncmpcpp: Update to 0.6.2

* gnu/packages/mpd.scm (ncmpcpp): Update to version 0.6.2.  Add boost,
  readline, autotools inputs.

gnu: mail: Add copyright line.

* gnu/packages/mail.scm (mu): Add forgotten copyright line.

gnu: Add font-adobe-source-han-sans.

* gnu/packages/fonts.scm (font-adobe-source-han-sans): New variable.

gnu: python: Drop special handling of python2-numpydoc as input.

* gnu/packages/python.scm (python2-numpy, python2-matplotlib,
  python2-ipython): Keep input python2-numpydoc created by
  package-with-python2.

gnu: python-numpydoc: Drop one test.

* gnu/packages/python.scm (python-numpydoc): Drop one test for all Python
  versions.
  (python2-numpydoc): Define it by package-with-python2 without modifications.

gnu: python2-py2cairo: Rename to python2-pycairo.

* gnu/packages/gtk.scm (python2-py2cairo): Rename to ...
  (python2-pycairo): ... this
  (python2-pygtk): Adapt input.
* gnu/packages/glib.scm (python2-pygobject-2): Adapt input.
* gnu/packages/python.scm (package-with-python2): Adapt input.

gnu: linux-libre: Update to 3.18.8

* gnu/packages/linux.scm (linux-libre): Update to version 3.18.8.

gnu: mu: Update to 0.9.11.

* gnu/packages/mail.scm (mu): Update to 0.9.11.  Update source URI.  Add
  autoconf, automake, and libtool to native-inputs.  Add autoreconf phase.

services: slim: Add "F1 to change" in session message.

* gnu/services/xorg.scm (slim-service)[slim.cfg]: Add 'session_msg'.

services: slim: Preserve the order of session types.

That makes WindowMaker the default session, by default.

* gnu/services/xorg.scm (xsessions-directory)[builder]: Prepend a number
  in the file name to preserve the order of SESSIONS.
  (slim-service): Augment docstring.
* doc/guix.texi (X Window): Adjust accordingly.

gnu: openexr: Add synopsis.

* gnu/packages/graphics.scm (openexr)[synopsis]: Fill in.
  [description]: Improve.

gnu: samba: Update to 3.6.25.

* gnu/packages/samba.scm (samba): Update to 3.6.25.

gnu: e2fsprogs: Update to 1.42.12.

* gnu/packages/linux.scm (e2fsprogs): Update to 1.42.12.

doc: Remove reference to git submodules in HACKING.

* HACKING: Remove mention of git submodules.

gnu: icecat: Apply fixes for CVE-2015-{0822,0827,0831,0836}.

* gnu/packages/patches/icecat-CVE-2015-0822.patch,
  gnu/packages/patches/icecat-CVE-2015-0827-pt-1.patch,
  gnu/packages/patches/icecat-CVE-2015-0827-pt-2.patch,
  gnu/packages/patches/icecat-CVE-2015-0827-pt-3.patch,
  gnu/packages/patches/icecat-CVE-2015-0831-pt-1.patch,
  gnu/packages/patches/icecat-CVE-2015-0831-pt-2.patch,
  gnu/packages/patches/icecat-CVE-2015-0836-pt-01.patch,
  gnu/packages/patches/icecat-CVE-2015-0836-pt-02.patch,
  gnu/packages/patches/icecat-CVE-2015-0836-pt-03.patch,
  gnu/packages/patches/icecat-CVE-2015-0836-pt-04.patch,
  gnu/packages/patches/icecat-CVE-2015-0836-pt-05.patch,
  gnu/packages/patches/icecat-CVE-2015-0836-pt-06.patch,
  gnu/packages/patches/icecat-CVE-2015-0836-pt-07.patch,
  gnu/packages/patches/icecat-CVE-2015-0836-pt-08.patch,
  gnu/packages/patches/icecat-CVE-2015-0836-pt-09.patch,
  gnu/packages/patches/icecat-CVE-2015-0836-pt-10.patch,
  gnu/packages/patches/icecat-CVE-2015-0836-pt-11.patch: New files.
* gnu-system.am (dist_patch_DATA): Add them.
* gnu/packages/gnuzilla.scm (icecat)[source]: Add patches.

gnu: luajit: Fix patch file names in gnu-system.am.

* gnu-system.am (dist_patch_DATA): Fix patch file names.

gnu: Fix luajit installation

* gnu/packages/lua.scm (luajit): Apply 2 patches.
* gnu-system.am (dist_patch_DATA): Register 2 patches.
* gnu/packages/patches/luajit-no_ldconfig.patch: New file.
* gnu/packages/patches/luajit-symlinks.patch: New file.

gnu: Add avidemux.

* gnu/packages/video.scm (avidemux, avidemux-2.5): New variables.

build: Bump version number.

* configure.ac: Change to version 0.8.2.

ui: Add missing copyright line.

* guix/ui.scm: Add copyright line for Deck (aka. nebuli).