added Goblom's ConfigManager.
https://forums.bukkit.org/threads/resource-the-easiest-simplest-way-to-handle-multiple-config-files.194271/

Signed-off-by: Hugo ThePooN Denizart <thepoon@cartooncraft.fr>
added config files, and godmode

Signed-off-by: Hugo ThePooN Denizart <thepoon@cartooncraft.fr>
when disabling, save all opened config files

Signed-off-by: Hugo ThePooN Denizart <thepoon@cartooncraft.fr>
- added LeaveEvent for the config file to save when leaving
- added DamageEvent for the godmode to work

Signed-off-by: Hugo ThePooN Denizart <thepoon@cartooncraft.fr>