README.md in tobox-0.5.0 vs README.md in tobox-0.5.1

@@ -239,10 +239,14 @@
 
 ### `shutdown_timeout`
 
 Time (in seconds) to wait for events to finishing processing, before hard-killing the process.
 
+### `grace_shutdown_timeout`
+
+Grace period (in seconds) to wait after, hard-killing the work in progress, and before exiting the process.
+
 ### `on(event_type) { |before, after| }`
 
 callback executed when processing an event of the given type. By default, it'll yield the state of data before and after the event (unless `message_to_arguments` is set).
 
 ```ruby
@@ -581,9 +585,10 @@
   # }
   #
   # now you can send them to your statsd collector
   #
   StatsD.gauge('outbox_pending_backlog', stats[:pending_count])
+  StatsD.gauge('outbox_oldest_message_age', stats[:oldest_event_age_in_seconds])
 end
 ```
 
 #### Bring your own leader election