winston logger.error(error) workaround, i.e. Issue #280

diff

diff --git a/node_modules/winston/lib/winston/common.js b/node_modules/winston/lib/winston/common.js
index c754942..8f69901 100644
--- a/node_modules/winston/lib/winston/common.js
+++ b/node_modules/winston/lib/winston/common.js
@@ -73,6 +73,9 @@ exports.clone = function (obj) {
   else if (obj instanceof Date) {
     return obj;
   }
+  else if (obj instanceof Error) {
+    return obj;
+  }
 
   var copy = {};
   for (var i in obj) {
diff --git a/node_modules/winston/node_modules/cycle/cycle.js b/node_modules/winston/node_modules/cycle/cycle.js
index 4382285..3df40be 100644
--- a/node_modules/winston/node_modules/cycle/cycle.js
+++ b/node_modules/winston/node_modules/cycle/cycle.js
@@ -49,6 +49,7 @@ cycle.decycle = function decycle(object) {
                   value instanceof Date ||
                   value instanceof Number ||
                   value instanceof RegExp ||
+                  value instanceof Error ||
                   value instanceof String) {
               return value;
             }