Add releasing-to-PyPI.md (#128)

Author: Wovchena

docs/releasing-to-PyPI.md

@@ -0,0 +1,10 @@
+```bash
+py -m pip install --upgrade build
+# Remove master omz_tools. Will use one from openvino-dev
+sed -i '/omz_tools/d' model_api/python/requirements.txt
+py -m build --sdist --wheel model_api/python/
+py -m twine upload --username __token__ model_api/python/dist/*
+git tag X.Y.Z
+git push upstream X.Y.Z
+```
+Pull request to increment `version` in `setup.py` for the next release.