Add status code to ApiResponse

We weren't setting this before.

Octokit/Http/JsonHttpPipeline.cs

@@ -3,12 +3,12 @@
 namespace Octokit.Http
 {
     /// <summary>
-    /// Responsible for serializing the request and response as JSON and 
-    /// adding the proper JSON response header.
+    ///     Responsible for serializing the request and response as JSON and
+    ///     adding the proper JSON response header.
     /// </summary>
     public class JsonHttpPipeline
     {
-        readonly IJsonSerializer serializer;
+        readonly IJsonSerializer _serializer;
 
         public JsonHttpPipeline() : this(new SimpleJsonSerializer())
         {
@@ -18,7 +18,7 @@ namespace Octokit.Http
         {
             Ensure.ArgumentNotNull(serializer, "serializer");
 
-            this.serializer = serializer;
+            _serializer = serializer;
         }
 
         public void SerializeRequest(IRequest request)
@@ -30,13 +30,14 @@ namespace Octokit.Http
             if (request.Method == HttpMethod.Get || request.Body == null) return;
             if (request.Body is string) return;
 
-            request.Body = serializer.Serialize(request.Body);        }
+            request.Body = _serializer.Serialize(request.Body);
+        }
 
         public void DeserializeResponse<T>(IResponse<T> response)
         {
             Ensure.ArgumentNotNull(response, "response");
 
-            var json = serializer.Deserialize<T>(response.Body);
+            var json = _serializer.Deserialize<T>(response.Body);
             response.BodyAsObject = json;
         }
     }