Fixed many descriptions
firefox-13.0: Remove

It's outdated, insecure and not used anywhere in Nixpkgs.
Allow leiningen to build on darwin
Merge pull request #4944 from aflatter/enable-leiningen-on-darwin

Allow leiningen to build on darwin
Add Lightum package: MacBook light sensor daemon

Also a NixOS service could make sense but the daemon puts
configuration under the Xdg user path.
purescript-0.6.0.2
Revert "haskell-pandoc-citeproc: drop obsolete versions 0.4 and 0.5"

This reverts commit d3b2c3f46c5bce8466e0813351afcaf2fe8fa92d.

@peti I'm reverting this commit until a resolution is found that allows
Hakyll to build.  I've confirmed that reverting it here fixes the build
error.
Drop reference to old shelly from haskell-defaults.nix
bird: bump
Merge pull request #4946 from puffnfresh/package/lightum

Add Lightum package: MacBook light sensor daemon
ocaml-sqlite3: update from 2.0.4 to 2.0.7
Revert "Revert "haskell-pandoc-citeproc: drop obsolete versions 0.4 and 0.5"".

This reverts commit dddea7f0d1ab765f. @jwiegley, Hakyll builds just fine with
pandoc-citeproc 0.6. See http://hydra.cryp.to/build/239248, for example. If you
have trouble compiling that package, then please share a build log that shows
the error message instead of reverting my commits, please.
Merge pull request #4948 from dysinger/purescript-0.6.0.2

purescript-0.6.0.2
flashrom: fix 4936
ipopt: add package
Merge pull request #4953 from abbradar/ipopt

ipopt: add package