Add pythonPackages.mrbob
Add pythonPackages.buildout
update minecraft recipe
Add pythonPackages.zodb3 and dependencies
update kernels: 3.0.59, 3.4.26 and 3.7.3
new download host for zfsonlinux.org: spl/zfs
mpd: Update to 0.17.3

Additionally, turn on a lot more features in mpd by
adding dependencies. Can be controlled by xxxSupport flags,
as before. By default, everything is enabled.
Merge pull request #268 from aristidb/minecraft

Minecraft update
Merge pull request #266 from aristidb/master

Dropbox 1.4.21
haskell-hs-bibutils: update to version 4.16
haskell-http-conduit: update to version 1.8.7
haskell-smallcheck: update to version 0.6.2
Test::Warn: Update to 0.24