Using abstract factory for pizza ingredients

src/pizzeria/ingredients/ChicagoPizzaIngredientFactory.java

src/pizzeria/ingredients/NYPizzaIngredientFactory.java

src/pizzeria/ingredients/PizzaIngredientFactory.java

src/pizzeria/pizza/CheesePizza.java

src/pizzeria/pizza/ChicagoStyleCheesePizza.java

src/pizzeria/pizza/ChicagoStyleClamPizza.java

src/pizzeria/pizza/ChicagoStylePepperoniPizza.java

src/pizzeria/pizza/ChicagoStyleVeggiePizza.java

src/pizzeria/pizza/ClamPizza.java

src/pizzeria/pizza/NYStyleCheesePizza.java

src/pizzeria/pizza/NYStyleClamPizza.java

src/pizzeria/pizza/NYStylePepperoniPizza.java

src/pizzeria/pizza/NYStyleVeggiePizza.java

src/pizzeria/pizza/PepperoniPizza.java

src/pizzeria/pizza/Pizza.java

src/pizzeria/pizza/VeggiePizza.java

src/pizzeria/store/ChicagoPizzaStore.java

src/pizzeria/store/NYPizzaStore.java

src/pizzeria/store/PizzaStore.java