1.3 update

• New: add the option for each door to prevent collisions of item frames with blocks, if activated it will not destroy item frames.
• Optimized the itemframe search algorithm (when putting items, you try to destroy the block or when there is a collision.) As you can see from the image, the algorithm is 234% faster (and in the worst case, when there is only one gate),

1.2 update

• From now on, itemframes cannot be destroyed if a door is activated. In case the player who tries to break it has the 'gate.admin' permission he will receive this message: "You can't break this pin when door is enabled"
• Now the plugin is opensource
• Added Javadoc