SimpleClaimSystem

Remove Preload-chunks setting from config.yml

Add claims-worlds-mode setting in config.yml (Set up how claims system is working per world, modes: SURVIVAL, SURVIVAL_REQUIRING_CLAIMS, DISABLED, check the documentation for more informations)

Fix a minor issue on permissions

Add permissions-on-SurvivalRequiringClaims setting in config.yml (Set up which permissions is enabled/disabled outside claims, only for the claims system mode : SURVIVAL_REQUIRING_CLAIMS)