Quick fix to make Nanobots 3 compatible with Industrial Revolution 0.9

Links constructor bots to copper level ingredients.

Completed:
1. mapped copper level to Nanobots
2. added dummy png for all 5 levels.

To Do:
1. add recipes for all 5 levels.
2. find way to link nanobot speed/range with the IR levels (copper, bronze, iron,.. etc).
3. update recipes accordingly

Needs:
1) Nanobots https://mods.factorio.com/mod/Nanobots
2) Industrial Revolution https://mods.factorio.com/mod/IndustrialRevolution