Merge branch 'release/RELEASE2'

.gitignore

src/python/PyBis/pybis/pybis.py

src/python/PyBis/setup.py

src/python/PyBis/tests/conftest.py

src/python/PyBis/tests/test_experiment.py

src/python/PyBis/tests/test_openbis.py

src/python/PyBis/tests/test_sample.py

src/vagrant/jupyter-bis/README.md