Add function Register_Bank() to INSERT INTO Banks
Add function List_Messages() to return list of Messages
Add MessageType input param
Allow input param MessageID to Get_Message() to be partial and throw error if multiple rows or no rows could be found
Add MessageType, but as we don't have pgp_armor_header(armor text, key text) yet, let it be a hard-coded value
Add column Messages.MessageType
Add MessageType to Create_Message() call. In passing, strip unnecessary args to psql
Add List_Messages() and Register_Bank() to install script
Call Register_Bank() instead of doing hard-coded INSERT INTO Banks