Added parsing of fees for Kraken exchange (#625)

ParseOrder method in the ExchangeKrakenAPI class will now parse the fee from the response and set it in the order result.

Author: Plumbly

src/ExchangeSharp/API/Exchanges/Kraken/ExchangeKrakenAPI.cs

@@ -206,6 +206,7 @@ private ExchangeOrderResult ParseOrder(string orderId, JToken order)
 			orderResult.AmountFilled = order["vol_exec"].ConvertInvariant<decimal>();
 			orderResult.Price = order["descr"]["price"].ConvertInvariant<decimal>();
 			orderResult.AveragePrice = order["price"].ConvertInvariant<decimal>();
+			orderResult.Fees = order["fee"].ConvertInvariant<decimal>();
 
 			return orderResult;
 		}