B9 changes

I don't really get to play KSP much, but lots of our users also use KSPi, so here is the patch I sent in for WaveFunctionP's branch.

Fixes a faulty scaling in the HL radiator sizes (the fuselage lengths are 2m, 4m and 8m) and adds radiators to the other cargo bays. I think I scaled them right (by surface area).