logstash service improvements

* add logstash-contrib plugins package
* add additional options to the logstash service
udisks: update from 1.0.4 to 1.0.5
Add claws-mail and libetpan.

Adds Nix expressions for claws-mail (http://www.claws-mail.org) and a
dependency that is not already in the tree, libetpan
(http://www.etpan.org/libetpan.html).

The Claws expression has flags for toggling the build of various plugins.
Added the grassroots DICOM library.
Added the dlib machine learning library.
Fixed the mirror:// download link for GDCM.
proot: remove self.stdenv.lib
Merge remote-tracking branch 'nixos/master' into proot

Conflicts:
	pkgs/tools/system/proot/default.nix
new package: svg2tikz
Added granite

Added meta details, changed hash to sha256, and added versions for granite

Changed name to use versions

Fixed license

Yet another typo fix

Added myself as maintainer and fixed typo

Fixed maintainers

Added pantheon terminal

woops
Add MKRAND
zsh: update from 5.0.6 to 5.0.7
Merge pull request #4428 from mknight-tag/master

New package: MKRAND
Astroid 1.2.1
Add license for svg2tikz
Merge pull request #4431 from DamienCassou/astroid-1.2.1

Astroid 1.2.1
Removed akunambol

It is not maintained anymore, and is not compatible with kde 4.14.
Made kde 4.14 the default kde
Removed kde 4.12
Merge pull request #4426 from ollieh/master

Added granite and pantheon-terminal