Update app.py and hexachords.py

Add new app and working version files

Add app.py and fixed hexachord

fixed hexachord

Update app.py, hexachords.py, and requirements.txt

Update app.py and hexachords.py

Update app.py and hexachords.py

Update app.py and hexachords.py

Add app.py and fixed hexachord

Update app.py and hexachords.py

Add app.py

Add files to project