Revenue types can be viewed by non-admins, but an admin user is required to manipulate admin data.
||The unique id of the revenue type|
||The name of the revenue type|
||The position in a list that this revenue type should appear in|
||There can only be one default revenue type at a time. Setting this to
||Timestamp for when the revenue type was created|
||Timestamp for when the revenue type was last touched|