gnu: libksba: Upsate to 1.3.4.

* gnu/packages/gnupg.scm (libksba): Update to 1.3.4.

gnu: exim: Update to 4.87.

* gnu/packages/mail.scm (exim): Update to 4.87.

emacs: Add 'guix-package-from-file' command.

* emacs/guix-main.scm (register-package, packages-from-file): New procedures.
(%patterns-makers): Add 'from-file' search type.
* emacs/guix-messages.el (guix-messages): Add messages for it.
* emacs/guix-ui-package.el (guix-package-from-file): New command.
(guix-package-info-insert-location): Adjust for 'from-file' type.
* doc/emacs.texi (Emacs Commands): Document it.

emacs: main: Remove top-level package tables.

* emacs/guix-main.scm (%package-vhash, package-vhash, %package-table)
(package-table, name+version->key, key->name+version): Remove.
(package-by-address, packages-by-name+version): Adjust by using delayed
local package tables.

emacs: Simplify 'guix-guile-boolean'.

* emacs/guix-guile.el (guix-guile-boolean): Use straightforward way to
  define true/false value.

Revert "gnu: libva: Update to 1.7.0."

This reverts commit cdda334ec2fcdd5946ba60853b7312283bf89712.

gnu: qemu: Update to 2.5.1.1 [fixes CVE-2015-8558, CVE-2016-{3710, 3712}].

* gnu/packages/qemu.scm (qemu): Update to 2.5.1.1.
[arguments]: Disable parallel tests.

gnu: guile-ncurses: Use 'modify-phases'.

* gnu/packages/guile.scm (guile-ncurses)[arguments]: Use 'modify-phases'.

gnu: guile-ncurses: Update to 1.7.

* gnu/packages/guile.scm (guile-ncurses): Update to 1.7.
[arguments]: Remove work-around for buggy test.

commit fixes http://bugs.gnu.org/21677

gnu: qemu: Update to 2.5.1.

* gnu/packages/qemu.scm (qemu): Update to 2.5.1.
[source]: Remove patches.
* gnu/packages/patches/qemu-usb-ehci-oob-read.patch,
gnu/packages/patches/qemu-virtio-9p-use-accessor-to-get-thread-pool.patch,
gnu/packages/patches/qemu-CVE-2015-8558.patch,
gnu/packages/patches/qemu-CVE-2015-8567.patch,
gnu/packages/patches/qemu-CVE-2015-8613.patch,
gnu/packages/patches/qemu-CVE-2015-8619.patch,
gnu/packages/patches/qemu-CVE-2015-8701.patch,
gnu/packages/patches/qemu-CVE-2015-8743.patch,
gnu/packages/patches/qemu-CVE-2016-1568.patch,
gnu/packages/patches/qemu-CVE-2016-1922.patch,
gnu/packages/patches/qemu-CVE-2016-1981.patch,
gnu/packages/patches/qemu-CVE-2016-2197.patch: Remove files.
* gnu/local.mk (dist_patch_DATA): Remove them.

gnu: connman: Fix url.

* gnu/packages/connman.scm (connman)[source]: Remove extra "/pub" from
the download url.

gnu: openntpd: Update to 5.9p1.

* gnu/packages/ntp.scm (openntpd): Update to 5.9p1.

gnu: youtube-dl: Update to 2016.05.01.

* gnu/packages/video.scm (youtube-dl): Update to 2016.05.01.

gnu: ffmpeg: Update to 3.0.2.

* gnu/packages/video.scm (ffmpeg): Update to 3.0.2.
[home-page]: Use https.

gnu: libva: Update to 1.7.0.

* gnu/packages/video.scm (libva): Update to 1.7.0.
[home-page]: Use https.

gnu: Add surf.

* gnu/packages/suckless.scm (surf): New variable.

Signed-off-by: 宋文武 <iyzsong@gmail.com>

gnu: Add wmfire.

* gnu/packages/gnustep.scm (wmfire): New variable.

Signed-off-by: Alex Kost <alezost@gmail.com>

guix: utils: Re-export 'memoize'.

Suggested by Ludovic Courtès <ludo@gnu.org>.

* guix/utils.scm: Re-export 'memoize' to avoid a potential breakage of
  emacs interface.  See
  <http://lists.gnu.org/archive/html/guix-devel/2016-05/msg00146.html>
  for details.

emacs: Add 'guix-version' command.

* emacs/guix-config.el.in (guix-config-name, guix-config-version): New
  constants.
* emacs/guix-about.el (guix-version): New command.  New file.
* emacs/local.mk (ELFILES): Add it.

gnu: mlt: Update to 6.2.0.

* gnu/packages/video.scm (mlt): Update to 6.2.0.
[source]: Download from github.
[inputs]: Add pulseaudio.