Fixed inheritance bug in GetFoodTask
Fixed inheritance bug in Dispensing and Serving
Fixed inheritance bug in Customer
Implemented a simple Player class

1. Extends Pawn, rather than just being an instance of PawnClass.
Implemented a simple Volunteer class

1. Same as player, was intended to be just a PawnClass, not is a class
extending PawnClass.
Fixed typo in Pawn (oops)
State now creates an actual Player