Source level 1.6
Check for cancel out of JOptionPane uses
Show the number of exceptions that occurred during repeating payments
Allow account closure
Allow accounts to close if they are less than half a cent from zero
Quash various null pointers
Don't show closed accounts where it isn't appropriate
Account manager can't see closed accounts
Customers can see their own closed accounts, as per the spec
Set CD interest based on premiums from the savings rate, and keep it constant for the duration of the CD, as per the spec
Set LoC interest based on a premium from the loan interest, again as per the spec