x10k Management Core

Added better ban & warn system, i updated the permission and cmds on the pastebin, anyway here are the cmds and perms also:

/ban <player> [duration] [reason]      - xmc.ban        - Temporary or permanent ban
/ban <player> -ip [duration] [reason]  - xmc.ban.ip     - IP ban a player
/unban <player>                        - xmc.ban        - Unban a player (normal + IP)
/warn <player> <reason>                - xmc.warn       - Warn a player
/warn clear <player>                   - xmc.warn.clear - Clear a player's warnings
/warns <player>                        - xmc.warn.view  - View a player's warning history