Added constructors to clients
Bank is now singleton
added printClents() to Bank
Changed logging operation

Signed-off-by: Ariel Voskov <Einstine1984@hotmail.com>
I don't know.
This piece of shit doesn't show me the difference

Made a new exceptions/WithdrawException.java

Signed-off-by: Ariel Voskov <Einstine1984@hotmail.com>