release_checklist

* Create a release branch from develop. (Only bugfixes in release branch)
* Increment version number in setup.py, __init__.py and in doc/index.rst
* Run nose2
* Update documentation
* Build the documentation (`sphinx-build -a -E -W -b html doc compiledDoc` to build it)
  Check all warnings during building of documentation
* Make sure all authors of code parts are properly acknowledged and their license is compatible
* Verify all issues on github are solved
* Check whether relevant example scripts still work
* Update setup.py to include all relevant subpackages and scripts
* Check test coverage. Add tests if required.
* Find dead code with `venv/bin/vulture forgi/ examples/ test/ ../ernwin/fess/ | less`, but manually check the results (vulture reports false positives)
* Verify that all files are included in the git repo. Try fresh install on different machine
* Write a change log to document API changes
* Run nosetests again.
* Merge into master and develop
* Tag inside master
* Upload the documentation to www.tbi.univie.ac.at/~thiel/ernwin