Merge pull request #743 from murgatroid99/node_status_errors

Make status errors actual Error objects when passing them to callbacks
diff --git a/src/node/src/client.js b/src/node/src/client.js
index aaa7be7..54b8dbd 100644
--- a/src/node/src/client.js
+++ b/src/node/src/client.js
@@ -245,7 +245,9 @@
           return;
         }
         if (response.status.code !== grpc.status.OK) {
-          callback(response.status);
+          var error = new Error(response.status.details);
+          error.code = response.status.code;
+          callback(error);
           return;
         }
         emitter.emit('status', response.status);
@@ -314,7 +316,9 @@
           return;
         }
         if (response.status.code !== grpc.status.OK) {
-          callback(response.status);
+          var error = new Error(response.status.details);
+          error.code = response.status.code;
+          callback(error);
           return;
         }
         stream.emit('status', response.status);