Update ledger3 to latest HEAD.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
zsh: Upgrade to 5.0.2
libreoffice: correctly pick python executable
libreoffice: specify number of build cores
libreoffice: correct python version
Revert "backup tools bup, storeBackup: implement sanity check" on behalf of Marc.

This reverts commit c823bc37d6b50dcd4e183963922da829a193f0d7. The
newly added test case needs more work to succeed on Hydra. See
<http://permalink.gmane.org/gmane.linux.distributions.nixos/11382>
for further details.
Merge pull request #898 from danieroux/upgrade-zsh-5.0.2

zsh: Upgrade to 5.0.2
unoconv: new package

unoconv is a tool that converts between any document format supported by
LibreOffice/OpenOffice.

Example of how to convert an .odt file to .pdf:
  unoconv -f pdf some-file.odt

Homepage: http://dag.wieers.com/home-made/unoconv/

Implementation notes:
unoconv must use the same python version as libreoffice (unless it will
not be able to load the pyuno module from libreoffice). And because we
recently switched to libreoffice 4.x, which uses python3, I had to
include unoconv-python3.patch. The patch comes from upstream unoconv.git
repo, so it will be included in the next release.
Update timeplot to 1.0.22 to fix building with Chart-1.0
Merge pull request #900 from errge/timeplot

Update timeplot to 1.0.22 to fix building with Chart-1.0
haskell-packages.nix: transformers is a core package starting with ghc 7.7
haskell-case-insensitive: add version 1.1
haskell-crypto-random: add version 0.0.5
haskell-groups: add version 0.3.0.0
haskell-hakyll: jailbreak to fix the build
haskell-accelerate-cuda: update to version 0.13.0.3
haskell-cipher-aes: update to version 0.2.4
haskell-clientsession: update to version 0.9.0.3
haskell-cprng-aes: update to version 0.5.1
haskell-crypto-numbers: update to version 0.2.0