LibrarySystem

BinHong Lee 729bbf9033 Main.java - Added returnBook(User, Book) which will update both the users and the books upon success on returning the book - Added currentDay() that would return the current date in int array - Added calDueDate(int) that takes the current date from currentDay() and calculate the due date from there		8 lat temu
.gitignore	Initial commit	8 lat temu
Book.java	Minor updates	8 lat temu
BookFactory.java	update() for BookFactory	8 lat temu
Main.java	Main.java	8 lat temu
User.java	getId(), UserFactory	8 lat temu
UserFactory.java	update() for BookFactory	8 lat temu