Separated the items that can be loaned out into their own package.
Standardised the format of all output messages in the code.
Added test for quiting the library.
Removed the Magazine as it was unnecessary.
Imports changed as part of moving loan items into a separate package.
Imports changed as part of moving loan items into a separate package.
Added a check to see if the Library is running as part of test the quit functionality.
Test class added for Login validation.