Make the RA superweapon descriptions a bit more consistent
Add build limits to iron and pdox
Move ra superweapons a little closer to the ra1 superweapons by removing bibs and changing the footprint of iron to 2,1
Apply offset to iron so it graphically fits on its footprint properly
Merge pull request #3560 from ScottNZ/superweapons

RA superweapon improvements