title: parse-server returns wrong Date format
body: <p>When querying on Parse server this is the result:</p>
  
  <pre><code>{
      "results": [
          {
              "objectId": "BMRfgFD1SU",
              "username": "demo@user.com",
              "createdAt": "2017-04-13T16:52:37.661Z",
              "updatedAt": "2017-04-13T16:52:37.661Z",
              "ACL": {
                  "*": {
                      "read": true
                  },
                  "BMRfgFD1SU": {
                      "read": true,
                      "write": true
                  }
              }
          }
      ]
  }
  </code></pre>
  
  <p>The problem is that the date format now is a String however it should be like:</p>
  
  <pre><code>{
   "__type": "Date",
   "iso": "2015-03-01T15:59:11-07:00"
  }
  </code></pre>