added smallmuse and movements

Update app.py, format_conversions.py, and hexachords.py

Update app.py, format_conversions.py, and hexachords.py

restructured the project a bit, added legacy folder

Updated app.py and format_conversions.py

Updated app.py and format_conversions.py

Update format_conversions.py

Update .gitignore with comprehensive patterns for generated and system files

Added format_converstions.py