The plugin now uses my own configuration system. There won't be any difference in its usage.
As a consequence, the configuration is now way more lisible and fancy.
If you were already using the plugin, you should delete your actual config, then run the server, or use /maint reload to reset your config to the new default one.
Added some configuration security: wrong values will be reported in the logs and won't cause errors
In some cases, the help message didn't show up when using wrongly the command. Fixed
Added a countdown of 10 seconds before a scheduled maintenance.
The seconds countdown message can be changed in the config.
