Adding a missing instruction for EFI installations

This commit also adds a link to rEFInd which is a useful tool to manage
EFI systems. If this link is not desired, I can remove it.
moved wrapper declaration to preFixup
Use make install instead of setup.py directly.

Using setup.py results in the following error message:

    Missing file: share/applications/gpodder.desktop

    If you want to install, use "make install" instead of using
    setup.py directly. See the README file for more information.
Merge pull request #3327 from svenkeidel/gpodder

added gpodder package
openopc: new package

"OPC (OLE for Process Control) toolkit designed for use with Python"

This package contains a python module (OpenOPC) and a command line
client (opc). The OpenOPC Gateway Service for Windows is also copied to
$out, for reference.

It only works with python2.7 (not python3.x), so I'm not adding it to
python-packages.nix.

Also add needed dependency, python-pyro3, a distributed object
middleware for Python (IPC/RPC).

http://openopc.sourceforge.net/
Merge pull request #3260 from linquize/gbdfed

gbdfed: add package 1.6
Merge pull request #3323 from wjlroe/logstash-1.4.2

Logstash 1.4.2
added metainformation for gpodder and mygpoclient
mesos: Add package

Apache Mesos is a cluster manager that simplifies the complexity of running
applications on a shared pool of servers.
Merge pull request #3336 from DamienCassou/installing-on-efi

Adding a missing instruction for EFI installations
added platform meta information to gpodder
Merge pull request #3338 from svenkeidel/gpodder-metainfo

added metainformation for gpodder and mygpoclient
go: Fix build

http://hydra.nixos.org/build/12538479
Merge remote-tracking branch 'origin/master' into staging

Conflicts:
	pkgs/misc/vim-plugins/default.nix
Don't use ensureDir
readline-6.3: Fix build on Mac OS X < 10.9

http://hydra.nixos.org/build/12476331
Merge pull request #3318 from joelteon/master

Fix icu4c build on darwin
opencv: Enable fewer dependencies by default

In particular, this prevents KDE from pulling in gfortran, numpy and
atlas. We don't want anything important depending on atlas because it
has a crazy non-deterministic build system.

http://hydra.nixos.org/build/12555947
gcc: Fix multilib builds

http://hydra.nixos.org/build/12578050
emacs: Remove 23.x