Merge pull request #85 from gigaroby/doc-fix

documentation fix
diff --git a/logger.go b/logger.go
index 7374fe3..b392e54 100644
--- a/logger.go
+++ b/logger.go
@@ -38,7 +38,7 @@
 //      Out: os.Stderr,
 //      Formatter: new(JSONFormatter),
 //      Hooks: make(levelHooks),
-//      Level: logrus.Debug,
+//      Level: logrus.DebugLevel,
 //    }
 //
 // It's recommended to make this a global instance called `log`.