Block Destroyer Quarry addon

[Rearth]

The block destroyer currently is a wannabe-quarry, but can only mine 1 layer. The idea was/is to create a block addon that allows it to instead target all layers below the machine frame.
This needs new block art and some work in the block destroyer code.
An open question/idea here is whether a single addon block should just directly allow it to work as a quarry, or if multiple blocks may be used. For example, each addon could multiply the range by 5 (e.g. 1, 5, 25, 125, 625). This would make the addon a bit more interesting, as the machine then also could be used to excavate large caves. The same addon could then also be used on the enderic laser to increase its range. However, needing multiple addon instances might also be annoying

[Rearth]

Is now available on master, and will be included in 0.5.0.