Check for tutorial completion

* Use empty default username for nickname
On gmail accounts, it would be suspect to have @gmail.com in nickname
Nickname is not set if user does not set one in config

* Fix typo

* Fix result key name

* Moved to own task

* Add example in config

* Rebased to latest dev on top of :
Fixing live stats crash on first run (#4088)
in order for the bot to reach the task without crashing

* damn thos DOS line endings

Author: net8q

configs/config.json.cluster.example

@@ -22,7 +22,14 @@
         }
       },
       {
-        "type": "CollectLevelUpReward"
+        "type": "CompleteTutorial",
+        "config": {
+          "enabled": false,
+          "// set a name": "",
+          "nickname": "",
+        }
+      },
+         "type": "CollectLevelUpReward"
       },
       {
         "type": "IncubateEggs",