V3.1 ItemJoin (New Features & Bug Fixes):

Added:

• You can now hide item attributes such as +5 damage with prevent-modifiers! Just add the tag attributes.
  
• Custom fireworks item!!! See the Documentations page.
  
• Color support for leather armor.
  
• Custom maps have been re-added back! This time no bugs. New style no longer utilizing url's but now uses the local plugin folder for png file.
  
• Cleaner way of setting up book items and firework items. Less useless code.
  

Fixed:

• Few major bug fixes.
  
• Bug not getting any item from ij get <item> if it was an arbitrary slot.
  

Please see the Documentations page if you need any help with these new updates!
Have any ideas or requests that you would like to see in ItemJoin's future? Please submit a feature request!