Update nerfs

I thought it was just gunboats, but apparently the armor upgrades won't mount on any large ships.

OK. The last set of nerfs I cannot undo. BUT I found a way round one of them. The GB/GS can only use heavy armour or higher. Cannot use the regular armour at all. The other nerf is no BS scanner on ships other than BS. I managed to fit a spyglass scanner on my cruiser and it works. Any issues just buy a smaller scanner and let me know. I'll edit them to spyglass. Not sure about other ships but post and I'll check.