Implemented Seach Singer and modified search item a bit
Implemented getLeadSinger 2D array
Implemented getting 2D array for HASSONG
Implemented Customer Registration and added test for it
Refactored Customer Registration and test for it
Implemented Customer Authentication function. Added tests
Added more tests for authentication and refactored some code
Finished Manager Transactions, update other files
Split Purchase transaction into steps
Add Items Transaction

Add Items transaction for managers complete
Fixed bugs in ManagerTransaction completed clerk
Implemented Item Search based on category and title
Changed datatypes to date to make returns easier.
Added checks for item quantity
Minor comments changes
changed to using arrayLists added sub transactions
Unfinished Process Order menu

Started on Process Order
Merge branch 'master' into clark
Finished all Manager transaction GUI

GUI for managers is done. I changed login back to a dialog because of
graphical bugs.
Changed Login GUI

Changed Login GUI back to a dialog because of graphical errors.