Main changes:

▸ Added Tab-completion system for all commands

▸ Added new commands for level management

▸ Added new access rights

New commands:

▸ /level help - Show help menu

▸ /level give <player> - Increase player level by 1

▸ /level take <player> - Decrease player level by 1

Access rights:

▸ levelplayers.give - Increase level

▸ levelplayers.take - Decrease level