Can't get material data of item stack

[NathanWolf]

This root issue (a Bukkit problem) is preventing the following:

The "absorb" spell won't correctly absorb material variants (colored wool, etc)
The "mine" spell won't mine lapiz lazuli
The "paint" spell and other material selection spells won't properly apply material variants.

[NathanWolf]

I still can't get the material data of an item stack, but I did figure out how to spawn an itemstack with data, thanks to Firestar's spawn_wool code!

This fixed the issues with mine and absorb, but not paint.