Creating a new class in class for class

Person class to demonstrate how to make a class.
Added driver class and IO
Created a second object and a set method for new objects

While you could probably build this function into the constructor for
the sake of the example its useful to demonstrate it in main to show
that you can work with a class from anywhere.
Display message for gradebook and some code clarification
Showed how we can pass variables into classes and their functions