Feature: fallback in the chat for the winner.

Fix: the timer was not removed from the scoreboard, if the scoreboard timer is used.
Feature: added a command to restart the game (/bos restart).

Refactor: the game isolation in the world is complete (“waiting” bossbar excepted).

Feature: the players in the winner team are broadcasted in the chat.
Feature: The spawn of animals and monsters is no longer disabled.
Feature: the game world can be explicitly set in the config.

To avoid the “waiting” bossbar to be displayed to everyone.