Added Credential lookup/storage in BankGlobal, as well as modified User
Constructors to check and enroll credentials on instantiation.  Modified
constructors for each user account to accommodate this.  Continuing work
on UI.
Merge branch 'master' of https://github.com/TobalJackson/UnTrustBank.git

Conflicts:
	UnTrustBank/src/bankUI/BankUI.java
	UnTrustBank/src/userTypes/OperationManagerUser.java