Changes:
- Now the plugin will prevent player from redyeing an item with the same color
- Added option to dye Leather Horse Armor
- Added support for dyeing stackable items, including: NAME_TAG, WOOL, CARPET, TERRACOTTA, CONCRETE, CONCRETE_POWDER, GLAZED_TERRACOTTA, GLASS, GLASS_PANE, CANDLE
- Added automatic config.yml updating
- Added the option to disable this plugin in certain world
