anchor.diff:  < 200
   < Content-Type: application/json
   {
  -  "total_pages": 1,
  -  "objects": [
  -    {
  -      "commodities": [],
  -      "id": 1,
  -      "name": "New York Stock Exchange",
  -      "symbol": "NYSE",
  -      "utc_created": "2013-05-18T04:08:32.702383",
  -      "utc_updated": "2013-05-18T04:08:32.702432"
  -    }
  -  ],
  -  "num_results": 1,
  -  "page": 1
  +  "total_pages": 1,
  +  "objects": [
  +    {
  +      "commodities": [],
  +      "id": 1,
  +      "name": "New York Stock Exchange",
  +      "symbol": "NYSE",
  +      "utc_created": "2013-05-18T04:08:32.702383",
  +      "utc_updated": "2013-05-18T04:08:32.702432"
  +    }
  +  ],
  +  "num_results": 1,
  +  "page": 1
   }
   
   List a particular stock exchange
  
positive.code:   "utc_created": "2013-05-18T04:08:32.702383",
    "utc_updated": "2013-05-18T04:08:32.702432"
  }
   
  Add new stock exchanges
  POST /exchange
  > Content-Type: application/json
  
negative.code: HOST: http://prometheus-api.herokuapp.com/
  
  --- Prometheus API ---
  
  -- Exchange Resources --
  
  List all stock exchanges
  