Add gramps package.

Basic functionality works. No plugins yet (TODO: GExiv2, pyICU, webkit,
osmgsmmap).

Gives error messages about errors in GTK installation regarding
localization. No impact other than the messages visible.
gramps: add license
ccl: fix paths to coreutils
Update matplotlib to 1.4.2.

matplotlib acquired two new dependencies: mock for testing
and pytz for rendering.
debootstrap | 404-fix:  -> 1.0.64, since 1.0.63 disappeared from archive
Megatools: update to 1.9.93
Add python-Twiggy 0.4.5.
Add python-bugzilla 1.1.0.
Bump Jinja2 to version 2.7.3.
Add python-taskw 0.8.6.
Add python-bugwarrior 1.0.2.
libpfm & rr: Add packages.
rr: Bump to version 2.0.0 and fetch it from github.
Fix filename for udev network interface rules

From http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/

You disable the assignment of fixed names, so that the unpredictable
kernel names are used again. For this, simply mask udev's rule file for
the default policy: ln -s /dev/null
/etc/udev/rules.d/80-net-setup-link.rules (since v209: this file was
called 80-net-name-slot.rules in release v197 through v208)
nixos: add peerflix module
nixos/peerflix: add test to release.nix
nixos/mesos: convert quorum to string
nixos/mesos: restart on failure
pngcheck: New package.
nixos/docker: fix module, add simple test