Add puts statement to initialize method for class Borrower to verify borrowers have been created.
Add puts statement to initialize method for class Book to verify books have been created.
Implemented add_book method to add a book instance to the library.
Updated Book class to add status and borrower, and added methods to call and update Book attributes.
Creates list_books method.
Adds borrowed_books and available_books methods.
Add check_out and check_in methods.
Updates Borrower class and creates borrowed_books method.
Final commit, no substantive changes.