MCTK-14: bump version to 0.1.1 (#28)

* update .bumpversion.cfg

* Bump version: 0.1.0 → 0.1.1

* update build.yml

MCTK-9: bump version to 0.1.0

MCTK-5: enhanced README.md and CONTRIBUTING.md, added doc strings for…

… models.py

* set up build CI on different OSs

* updated build.yml

* export coverage report to python_junit.xml

* changed License

* added doc strings for models.py

* enhanced README.md and CONTRIBUTING.md