anchor.diff:  < Content-Type: application/json
   {
     "commodities": [], 
  -  "id": 1, 
  +  "id": id, 
     "name": "New York Stock Exchange", 
     "symbol": "NYSE", 
     "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
  
positive.code: < 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
  }
  
  List a particular stock exchange
  
negative.code: HOST: http://prometheus-api.herokuapp.com/
  
  --- Prometheus API ---
  
  -- Exchange Resources --
  
  List all stock exchanges
  