add pypi distribution script

Makefile

@@ -0,0 +1,21 @@
+.PHONY: help
+help:
+	@echo 'commands:'
+	@echo '  dist'
+
+dist-env:
+	@echo Creating virtual environment...
+	@python3 -m venv 'dist-env'
+	@source dist-env/bin/activate && pip install twine
+
+.PHONY: dist
+dist: dist-env
+	[ -z "$${VIRTUAL_ENV}" ]  # you can not do this inside a virtual environment.
+	rm -rf dist
+	@echo Building...
+	python3 setup.py sdist bdist_wheel
+	@echo
+	rm -rf ./*.egg-info/ ./build/ MANIFEST
+	@echo Publishing...
+	@echo "\033[0;31mEnter your PyPI token:\033[0m"
+	@source dist-env/bin/activate && export TWINE_USERNAME='__token__' && twine upload dist/*