V0.7.2 Patch
This patch addresses a bug where the creation of arenas in version 0.7.0 or 0.7.1 the arena save files were missing the id value. This would cause a loading fail on the next startup. In this patch, the arena will be skipped and not loaded if missing the id. You can manually add "id: " to the config and the plugin will then load the arena. Any arenas from before 0.7.0 will still work and any arenas made in 0.7.2 will now correctly save.
Also changed was the countdown titles to display a little bit more precisely to the correct countdown and also stops the last title to stay for too long.
Something else to note, this version only supports Spigot/Bukkit 1.11 due to the countdown change, I will look into re-adding 1.10 and 1.9 support.