I forgot to remove some debug info from the previous build and this fixes that. No more console spam!

Opening an ender chest with a sign now plays a sound.

This update adds support for floor signs and fixes a ClassCastException. Floor signs will target the block they face most towards. Floor signs pointing in exactly diagonal directions are ignored.

There's now item frame support! (enabled by default). If an item frame is attached to a container, a player must sneak to interact with the item frame instead. Otherwise, the container will open.
It is controllable by LCUP's only config option enable-item-frame-handler.
Also I updated the update checker. Thanks Alex

LCUP now supports any block labelled a 'container.' This includes:

• Barrel
• Blast Furnace
• Brewing Stand
• Chest
• Dispenser
• Dropper
• Furnace
• Hopper
• Shulker Box
• Smoker

And now Ender Chests will open your ender chest.

The Interact handler will no longer cancel playerInteract events. This is to possibly fix compatibility with various sign-related events.

I had to upload a placeholder to generate my Resource ID.