LoopUntilQuit

~ IDE Files
~ BibliotecaApp.java
~ BibliotecaAppTests.java
CheckoutBook

~ IDE Files
~ BibliotecaApp.java
~ Book.java
~ BibliotecaAppTests.java
CheckoutBook & Successful Checkout

~ IDE Files
~ BibliotecaApp.java
~ BibliotecaAppTests.java
Additional Test to make sure books are not visible when checked out

~ IDE Files
~ BibliotecaAppTests.java