Changelog and version boost for 0.4.1

unfortunately for me (but fortunately for humanity ;)) cannot just reupload
0.4.0 into pypi, so minting a new quick release.  Tarball for 0.4.0 missing
setup_tools was removed since not usable

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented (for humans) in this file
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [0.4.1] - 2021-02-01
+
+Just a quick re-release for PyPI ensuring (manually) that setuptools_scm is present
+in the environment while running `sdist` so all auxililary files such as `setup_tools.py`
+are included in the distribution.
+
 ## [0.4.0] - 2021-01-28
 
 ### Added

reproman/version.py

@@ -11,7 +11,7 @@
 from os.path import lexists, dirname, join as opj, curdir
 
 # Hard coded version, to be done by release process
-__version__ = '0.4.0'
+__version__ = '0.4.1'
 
 # NOTE: might cause problems with "python setup.py develop" deployments
 #  so I have even changed buildbot to use  pip install -e .