Changed Draft version to 5
Added ./extras system path to script

The ./extras directory contains this draft’s newest feature - games!
Fixed vertex bug

In the quadratic class, this bug was causing the vertex to be the
opposite value of what it should have been. Oops!
Added new feature: Games!

Procrastinating has never been easier. Play simple but fun games in
between calculations to get a break from the homework! Games include:

    - Tic-Tac-Toe
    - Hangman

More to come!