Refactor Immovable Rod
Created by: clusterfack
I'm going to fall asleep now but I've remade immovable rod. It's pretty neat now if you throw one at the station.
Things I want to fix before this gets merged.
- It needs a better method for choosing targets and the target should terminate at the end of the zlevel approximately
- Still has some stupid issue where the appearance is all fucked up when it's tearing through the station instead of being like a normal projectile