Changes

Try to fix the weird fuel-consumption behaviour of the Smeltery. It should only consume fuel if it needs any now. And also it shoudl not randomly lose lava anymore.

Lava lasts a tad longer. Turns out smelteries are consuming 1.5x as much lava as the old smelteries! It's only 1.25 as much now.
To be exact: 15 mb are used every 4 seconds

Try syncing internal itemstack damage with the damage from the tool