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
Added the grassroots DICOM library.
Added the dlib machine learning library.
Fixed the mirror:// download link for GDCM.
Added Christopher Poole to the list of dlib package maintainers.
keepass: Bump version to 2.28
fritzing: add version 0.9.0b

- An open source prototyping tool for Arduino-based projects
golang: add golint and gotags
zarith: update from 1.2.1 to 1.3
libsieve: new package
discount: new package
chromiumStable 38.0.2125.101, chromiumBeta 39.0.2171.19, chromiumDev 40.0.2182.3
yasm: update from 1.2.0 to 1.3.0
Merge pull request #4460 from vbgl/zarith

zarith: update from 1.2.1 to 1.3
maxima: update from 5.33.0 to 5.34.1
ocaml-reactivedata: new package

reactiveData is an OCaml module for functional reactive programming
(FRP) based on React.

Homepage: https://github.com/hhugo/reactiveData
ocaml-pgocaml: new package

PG'OCaml provides an interface to PostgreSQL databases for OCaml
applications.

Homepage: http://pgocaml.forge.ocamlcore.org/
ocaml-macaque: new package

MaCaQue (or macaque) is a DSL for SQL Queries in Caml.

Homepage: https://github.com/ocsigen/macaque
cura: update from 14.07 to 14.09