Python-package-sync-tool

Changed
- Upgrading urllib3, SQLAlchemy, pycrypto dependenies beacause of volnurabilities issues.

Changed
- Fixing python-package-sync-tool.
- Creating alias reqsync to python-package-sync-tool.
- Some minour fixed.

Changed
- Changing dependency version of alex-ber-utils to 0.2.1.

Changed
- Only bumping up version.

Changed
- Added alex-ber-utils as dependency.
- Deleting old README-old.rst file.
- requirements-src.txt updated.
- Clarification added to README.md that alex_ber_utils should be installed first.
- formatting CHANGELOG.MD (minor fix)
- Added alternative of usage of python_package_sync_tool to README.md
- Fixing bug that --add is empty
- Factor out tests_data to seperate folder, use importlib.resources API.
- Updated README-old.rst

Changed
- README.md change, key '-U' added to pip3 install.