removed status get method and added attr_accessor for status
removed unneseccary add_book method from Library class
Changed checked_out_books variable in Borrower to be an array instead of a number. Holds an array containing books that the Borrower has. Tests pass
Added method to allow Borrower to leave reviews and store in a hash. Also wrote test case to test this method
Added optional year_published and edition attributes to a book. Added test cases as well
Deleted book_reviews hash and also changed checked_out_books array and combined them into one data structure. Now, a borrower that has a book checked out will have it stored in a hash along with its reviews and days until due
Added Time class which has class method to elapse a certain amount of days
Fixed typo