v0.0.2: Prepared repository for pypi release

• Updated github badge label in README.md
• Changed README text type to markdown
• Prepared README.md for first release on pypi
• Put all relevant imports into src/stadtradeln_data_tool/__init__.py

v0.0.1: Initial release

• Added a command-line interface for managing STADTRADELN datasets: stadtradeln-data-manager
• Added a library for importing STADTRADELN datasets into pandas and more: stadtradeln_data_tools