logstash service: make log verbosity configurable.
nixos-iso: Add zfs / btrfs to supportedFilesystems
Upgrade Pure to 0.63
smpeg: fix smpeg-config
SDL_mixer: add mp3 support
kde installer: Add gparted, nixos manual and konsole in the desktop
Atom: updated to 0.139.0
Update Hawkthorne game to v0.12.0
nix-exec: bump
Adding an extra url for nc6. The previous was failing.
cjdns: update 20140928 to 20141023
libyubikey: Reformat derivation
hidapi: Add derivation
libu2f-host: Add derivation
libykneomgr: Add derivation
yubikey-personalization: Add derivation
yubikey-personalization-gui: Add derivation
bigloo: 3.7a -> 4.1a-2

Signed-off-by: Austin Seipp <aseipp@pobox.com>
ruby: Fix build on systems with store optimisation. Closes #4273. #4266 promises a better fix.

(The build process attempted to copy file a overwriting file b, where a
and b are hard-linked, which results in cp returning a non-zero exit
code.)
https://github.com/NixOS/nixpkgs/issues/4266
gambit: 4.6.1 -> 4.7.3

Signed-off-by: Austin Seipp <aseipp@pobox.com>