Merge remote-tracking branch 'origin/standalone_develop' into standalone_develop

app/views/users/messages/_message.json.jbuilder

@@ -6,6 +6,7 @@ json.status message["status"]
 json.content message["content"]
 json.notification_url message["notification_url"]
 json.source message["source"]
+json.created_at message["created_at"]
 json.time_ago time_from_now(message["created_at"].to_time)
 
 case message["type"]