kde: Copy 4.12 to 4.14 as a base"
kde: Some tweaks to kde-manifest.sh
- Allow packages with different versions than $release (kde-workspace)
- Extra checks

This is a copy of https://github.com/wmertens/nixpkgs/commit/41faadbcce71226386ebc334bc02070492756f9a
but for 4.14.
kde-4.14: Fix source for module subdirectory packages.
Add non-legacy qt-gstreamer.
Only compile tested (needed by Artikulate in KDE 4.14).
kde-4.14: Initial porting.
Nix evaulation succeeds (but probably not building everything).
kde-4.14: Adjust fixed output hashes.
indilib: Add version 0.9.9.
kde-4.14: Make it all build.
kde: Allow kde_next as a desktop environment

This is the same as
https://github.com/wmertens/nixpkgs/commit/93fda9e353bb9408ea80339f36fa513742d65ddf
merge #4265: add KDE 4.14.1
kde-4.14: fix kactivities download

It was not released with 4.14.
http://osdir.com/ml/kde-commits/2014-07/msg02039.html
thunderbird: maintenance update

The corresponding security problem should've been fixed by the latest nss update.
bro: update from 2.1 to 2.3.1
python2nix: update to latest

Switch to upstream repo now that pull request #3 is merged.
python3Packages.pelican: fix build
pythonPackages.nose: disable tests
nixos: increase timeout for jenkins/munin systemd services
package update: go-1.3.1 -> go-1.3.2

Closes #4279