Fixing some errors between the old format and the new one + adding command /scenario.

resources/config.yml

@@ -1,6 +1,12 @@
 ---
 # Set your worlds here !
-worlds: []
+worlds: 
+# Example:
+  # world:
+     # radius: 1000
+     # maxplayers: 32
+
+     
 # Will be added if you add scenarios
 scenarios: []
 ...