Proportions 2.4.2 released

[PvK]

Thanks Oleg. I thought I'd tested that, but ah well. The thing is they are all in the same family, so the intention was that they would upgrade to the biggest and brightest. It seems important to be able to upgrade from complex to megacomplex without scrapping. For some reason, it seems that it upgrades only to the first facility found with the highest roman numeral, so that's Facility II, not Megacomplex II. Ooops. So I either need to change the numerals, or reverse the fac family order. I may do one way for 2.4.3 (to preserve games in progress) and the other for 3.0 (since it will be easier to understand).

PvK