title: AlamofireObjectMapper: JSON with Identifier
body: <p>Is it necessary to write an wrapper-object for AlamofireObjectMapper when the data is encapulated? E.g. if the weather data would be inside a named array "data". What would be the best solution to the mapping?</p>
  
  <pre><code>{
      "data": [
          {
              "conditions": "Partly cloudy",
              "day": "Monday",
              "temperature": 20
          },
          {
              "conditions": "Showers",
              "day": "Tuesday",
              "temperature": 22
          },
          {
              "conditions": "Sunny",
              "day": "Wednesday",
              "temperature": 28
          }
      ]
  }
  
  let URL = "https://raw.githubusercontent.com/tristanhimmelman/AlamofireObjectMapper/f583be1121dbc5e9b0381b3017718a70c31054f7/sample_array_json"
  Alamofire.request(.GET, URL, parameters: nil)
           .responseArray { (response: [Forecast]?, error: ErrorType?) in
              if let response = response {
                  for forecast in response {
                      print(forecast.day)
                      print(forecast.temperature)           
                  }
              }
  }
  </code></pre>