refs https://github.com/TryGhost/Team/issues/1198
no-issue More cleanup to pull files into their appropriate responsibility
no-issue This is only ever used in this directory so it makes sense to be colocated.
refs https://github.com/TryGhost/Team/issues/1083 We now allow creating offers for a fixed amount, rather than a percentage. These require a currency to be passed as a fixed amount is meaningless without one.
