dub: Add dub to interact with the D package registry

Python: add pgcli + update/add various libraries

Fix build of 'pyacoustid' under Python 3.

add package MJPG-streamer

Fix and upgrade Docker

nixpkgs: patch unbound 1.5.1 for linux < 3.15

Riemann: update to 0.2.8

Upgrade Jansson to 2.7

Docker doesn't support Go 1.4 yet. It compiles but it causes multiple
bugs. We should use Go 1.3 to build until the next release.

This seems to fix the following two problems I've been having:

https://github.com/docker/docker/issues/9649

https://bugzilla.redhat.com/show_bug.cgi?id=1169151

Enable experimental for gst-plugins-good

Otherwise, the build fails, saying:

    c2hs: Errors during expansion of binding hooks:

    /nix/store/d6m9m2wqaymfiwbx11frdsm1cz7qjkdm-ncurses-5.9/include/curses.h:405: (column 2) [ERROR]  >>> Illegal type!
      The type specifiers of this declaration do not form a legal ANSI C(89) type.

This patch fixes https://github.com/NixOS/nixpkgs/issues/5873.

Add cocreature as maintainer of openjdk8

Change-Id: I42b8e5f1341df826e8424141e9f9623e60b63767

The option had been added to the grsec build-support code,
but it hadn't been added to the grsec module.

After this commit, grsec module users will be able to change
the default value. It also serves to document that this option
exists and that NixOS will disable it by default.

Jsonm is an OCaml non-blocking streaming codec to decode and encode the
JSON data format.

Homepage: http://erratique.ch/software/jsonm