Shut up a warning in stage 2
sec: update to version 2.7.6
firefox-bin: update to version 31.0
nixos: tmp on tmpfs option

/tmp cleaning is done by systemd rather than stage-2-init
enableEmergencyMode moved from systemd to seperate module
new option to mount tmp on tmpfs
new option to enable additional units shipped with systemd
add source-han-sans-japanese, source-han-sans-korean, source-han-sans-simplified-chinese, source-han-sans-traditional-chinese: An open source Pan-CJK typeface
source-han-sans: fixed package name
Set CONFIG_SHELL to stdenv.shell in the default builder, just like SHELL
added cadaver: a command-line WebDAV client for Unix
postgresql: Update to 9.0.18, 9.1.14, 9.2.9, 9.3.5
lib/licenses.nix: convert to spdx.org shortnames

Done where possible, replacing links to point to spdx.org (probably stabler).
Also make libtiff use its dedicated license.
lib/licenses.nix: improve sortedness
lib/licenses.nix: allow choosing license by its shortName

Example: license = licenses."GPL-2.0+";
This comes with some performance cost during eval of licenses.nix,
but that's probably negligible.
xlsfonts, xfontsel: fix meta typo
doc/meta.xml: fix github links, clarify licensing section
scummvm: version bump to 1.7
rust: Add hashes for i686-darwin
gtkpod: bump to 2.1.4
added meta information
Agda needs an older version of haskell-equivalence
idris: 0.9.14 -> 0.9.14.1