Add a failing test for Pizza::Topping.initialize.
First tests passes and now a second test testing to see if a pizza is vegetarian.
Created a way to set a pizza to vegetarina.
Adds a test to record all of the toppings.
Created an initialize method for Pizza pies that can take toppings.
Adds a test to make sure that a pizza wihtout toppings has a default of cheese.
Edits the initialize pie method to give pizzas a default value of cheese.