public void writeToNBT(NBTTagCompound compound)
{
	super.writeToNBT(compound);
	if (itemStack != null){
		compound.setTag("heldItem", itemStack.writeToNBT(new NBTTagCompound()));
	}
}
public void readFromNBT(NBTTagCompound compound)
{
	super.readFromNBT(compound);
	if (compound.getCompoundTag("heldItem") != null){
		itemStack = ItemStack.loadItemStackFromNBT(compound.getCompoundTag("heldItem"));
	}
}