+1

I disagree on this PR, specifically putting the method in Inventory. I propose a NameableEntity interface.

Reasoning:
In 1.5 (Well, the prereleases currently) you can provide custom names for most things with inventories and all livingentities (Except players? I think?). With Villagers, this custom name is the same for both the name tag that can be toggled enabled overhead and the inventory menu for trading with that villager. For chests and other inventories it affects the inventory display as well.

But Villagers themselves are an inventory and I think it should go there.

Ok, I might try that. Could we use the Nameable class for items too since
they can be renamed now?

@md-5 villagers contain an inventory, but do Bats? Do Sheep?

@mbax but we are talking about containers, not entities....

@md-5 Inventory names are about to come from their associated entities and tileentities. I argue it'd be better as a consistent Interface that could be applied to livingentities and blockstates. :)

@iKeirNez This needs to be updated to the latest version of Bukkit.

Abandoned.