Updated the home page to display battle level

only changed html and css
Created the data for the Demo of the app

In SELP you can switch out the synthesised data
Janitorial, cleaned up SELP

refactored some functions and added comments for documentation
Implemented the all counter and renamed main file

SELP.py became app.py
Great refactoring of tests on pairs
Important change to stop level 3 pairs

The amount of demo data has be increased
Refactoring of the data sythnthisiser