* added Makefile; optionally install dev requirements

* added ci-build-and-test

* use ci-build-and-test

* don't install dev dependencies as part of project_tests

* renamed to dev

* use PROJECT_FOLDER for consistency with other projects

* change order of tests run

* added pylint check

* added pylintrc to docker image

* reduced accessive apache beam debug logging

* configured pylint, addressed linting

* enabled flake8 checks

* downgrade pycodestyle to 2.3.1 due to error

* switch to 4 spaces indent

* autopep8

* more flake8

* added new line to .flake8