matplotlib: fix build on darwin

* build with clangStdenv
* update to 1.2.1
WIP: pypy
pypy: fix stdenv.lib removal
pypy: fix some tests, add install phase
Update pypy build with sqlite and expat support. Fix the installPhase.
pypy: correctly skip tests
Merge branch 'pypy'
fix ignore param for tests
Add nixpkgs-lint

This is a simple tool to scan Nixpkgs for violations of the packaging
guidelines, such as multiple packages with the same name, packages
that lack a description or license, and so on.

To use:

$ nix-env -i nixpkgs-lint
$ cd .../nixpkgs
$ nixpkgs-lint

Current statistics:

Number of packages: 8666
Number of missing maintainers: 3711
Number of missing licenses: 6159
Number of missing descriptions: 1337
Number of bad descriptions: 633
Number of name collisions: 277
python-hetzner: Update to new version 0.5.0.

This introduces the following changes:

 - New subcommand "show" for hetznerctl which shows additional
   information about one or more servers.
 - Allow to get subnets of a specific server through the "subnets"
   attribute.
 - Allow te get IP addresses of a specific server through the "ips"
   attribute.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
hetzner-nixops-installer: Remove package.

This package now is in NixOps directly, so we don't need it here
anymore.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
chromium: Update beta and dev release channels.

Introduces the following new versions:

beta: 29.0.1547.22 -> 29.0.1547.32 (builds fine, tested)
dev:  30.0.1568.0  -> 30.0.1573.2  (builds fine, tested)

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
linux-3.10: upgrade to 3.10.3
pypy: try to fix remaining 4 tests
calibre: upgrade to 0.9.11 (fixes #777)
pypy: currectly use bash
urxvt: Enable Gdk_pixbuf to be able to set custom icons/images
Merge pull request #780 from grwlf/urxvt-gdkpixbuf

urxvt: Enable Gdk_pixbuf to be able to set custom icons/images
properly use & when ignoring tests
haskell-git-annex: update to version 4.20130723