Include sample responses

[yazinsai]

In addition to including the requests (e.g. curl https://api.verifypayments.com/...), we should include some sample responses (for e.g.):

{
  "id": "ba_81047f09b378e5fe896372868579fb06",
  "object": "bank_account",
  "name": "Abdullah Mohamed Alahmed",
  "is_individual": "true",
  "account_number": "67890123456",
  "iban": "AE070331234567890123456",
  "currency": "AED",
  "last_accessed": "2018-03-01T13:12:22-08:00"
}