Add the Geant4 Monte Carlo radiation transport toolkit and its Python bindings.
update bud to 0.32.0 (WIP)
update google music-manager
rJava: adding missing dependencies and JAVA-env-variables
update links
Allow ansible to install on darwin platforms

I am using this package on my Yosemite install of OS X and it works great. It also pretty closely follows the Homebrew recipe that most OS X users use, so I think we can open it up to other OS X users.
Update to latest ansible version
Removed all versions of geant4 except for the latest one.
dhcpcd: update from 6.4.3 to 6.4.7
Add haskell package wai-util to nixpkgs
Updates camlp5 6.11 -> 6.12
hol_light: update to r199

And adds compatibility with camlp5-6.12
fetchurl: resume download of curl exits with status code 18
nixos: Add option services.cron.cronFiles

This allows you to configure extra files that should be appended to your
crontab. Implemented by writing to /etc/crontab when the cron service starts.
Would be nicer to use a cron that supports /etc/cron.d but that would require
us to patch vixie-cron.
coq-containers: package is broken
r-XML: adding system-dependency libxml2
telepathy: 0.5.3 -> 0.8.80
Specify unfree license for Opera browser
Make path to Xcode configurable
tibia: update to 10.57