Release 1.2.1

Whoups, I released the 1.2.0 tag on github and then realized I had
forgot to update this setup.py file.

Note to self: I think the order to release is

 * (i) Update version number in setup.py
 * (ii) pypi (Executing `python setup.py sdist upload`)
 * (iii) Add tag on github (https://github.com/spotify/luigi/releases)
 * (iv) Then bump setup.py, "preparing for next release".

Merge pull request spotify#974 from spotify/erikbern/tarrasch

Added tarrasch as the chief maintainer

version 1.1.2 (fixed a critical bug in 1.1.1)

Releasing 1.1.1

Version 1.1.0

Main update is Python 3.3 and 3.4 support

bumped version to 1.0.24

Merge pull request spotify#732 from splusminusx/patch-1

Pass sys.argv to daemon main function.

Fixed an issue with bin/luigid and bumped to 1.0.22

Merge pull request spotify#730 from spotify/erikbern/core

changed EnvironmentParamsContainer -> core

Merge pull request spotify#727 from spotify/erikbern/scheduler-config

Use new-style config mechanism for the scheduler