NOW ADDED!

A failsafe against signs going blank! No more of that bull****!

Custom messages are actually implemented now! Change what things say on signs and in chat! (Not 100% done. Still need to add in all other messages.) Change those messages up now, homeskillet.

Thanks to @plumeex for pointing out the double-chest shop issues. They should all now be resolved. Ya, science!

Also, shops can now be created in 2 ways! You read that right. TWO WAYS! HOLY COW!!!
The first remains the same. Put the sign in front of the chest on the ground to create the shop.
You can now also hold shift and slap that sucker of a sign directly onto the front of the chest and take things from there.

Sit tight, more updates to come with even more improvements and added features.