Revert "Post System Crash update"

This reverts commit 9ac2a5bc2999089596be919603abe5755f0040ba.

Conflicts:
	bin/.gitignore
	src/Item/Book.java
	src/LibrarySystem/AddBook_UI.java
	src/LibrarySystem/Login_UI.java
	src/LibrarySystem/ReceptionTUI.java
	src/User/ReceptionistMain_UI.java
	src/User/bookSearch.java