Bukkit

- Updated to 1.16 and 1.17;

Added experimental features:

- /ckits seticon <kitname> That allows you to set item to be displayed in a kit gui instead of minecarts;

- weight parameter that allows you to sort kits in gui;

- preview sign, ckits.sign.preview permission is needed. Sign is made using these lines:

[CKits]

Preview

<kitname>