update schemas for cards and customers

[matthewfl]

@cieplak can you confirm that this has been deployed

[mjallday]

deployed to integration, we'll push to live shortly.

[mjallday]

deployed to live environment

curl https://api.balancedpayments.com/cards/CC5H1ZZk43sPUu0f9lIxbhgF \
     -H "Accept: application/vnd.api+json;revision=1.1" \
     -u ak-test-eyoGATiAg6YE5thvhSiWIi7NE0zg0l0U:

{
  "cards": [
    {
      "cvv_match": "yes",
      "links": {
        "customer": null
      },
      "name": null,
      "expiration_year": 2020,
      "avs_street_match": null,
      "is_verified": true,
      "created_at": "2014-04-29T00:46:42.022131Z",
      "cvv_result": "Match",
      "brand": "MasterCard",
      "number": "xxxxxxxxxxxx5100",
      "updated_at": "2014-04-29T15:06:48.309366Z",
      "id": "CC5H1ZZk43sPUu0f9lIxbhgF",
      "expiration_month": 12,
      "cvv": "xxx",
      "meta": {
        "twitter.id": "1234987650",
        "facebook.user_id": "0192837465",
        "my-own-customer-id": "12345"
      },
      "href": "/cards/CC5H1ZZk43sPUu0f9lIxbhgF",
      "address": {
        "city": null,
        "line2": null,
        "line1": null,
        "state": null,
        "postal_code": null,
        "country_code": null
      },
      "fingerprint": "fc4ccd5de54f42a5e75f76fbfde60948440c7a382ee7d21b2bc509ab9cfed788",
      "avs_postal_match": null,
      "avs_result": null
    }
  ],
  "links": {
    "cards.card_holds": "/cards/{cards.id}/card_holds",
    "cards.customer": "/customers/{cards.customer}",
    "cards.disputes": "/cards/{cards.id}/disputes",
    "cards.debits": "/cards/{cards.id}/debits"
  }
}