Added role amounts for Detectives/Murderers and some bug fixes
1.4.4 Release Notes:
Added custom role amounts for Detectives/Murderers.
Fixed PlayerLeaveEvent throws exception if player is in-game.
Some additional bug fixes related to setup menu.
Add 'murderersPerPlayer: 16' and 'detectivesPerPlayer: 16' under each arena in arena.yml file or delete the file to regenerate, otherwise setup menu will throw an exception.