PowerRanks

Changelog:

• Added experimental rank & player data synchronization for multi-server support using MySQL
• Added '/pr config enable/disable bungeecord'
• Added '/pr config set bungeecord_server_name '
• Added more information to '/pr dump' when it fails
• Added tablist header & footer manager
• Added tablist header & footer animations
• Added '/pr tablist ...'
• Moved tablist configuration to tablist.yml
• Removed '/pr config enable/disable tablist_sorting'
• Removed '/pr config enable/disable reverse_tablist_sorting'
• Fixed '/pr reload <config/all>' to include more configuration files
• Fixed tablist update spamming verbose log
• Fixed language message for '/pr we'