Jet rebalance, DRE support, ATM support, better MFT integration.

Jet stuff is essentially what I gave you the other day, with the intake usage on the KA engines tweaked so they have a slightly higher operational ceiling.

DRE is split between Karbonite and Parts Pack, because it seemed to make sense to do it that way >_>

ATM is now enabled - separate file for PartsPack here too.

MFT/RF support is improved, but the KA tanks are not converted to MFT/RF since B9 users tell me MKS/OKS has issues with MFT, and MFT's TweakScale support is still not working.

Slightly tweak the ISP on the 1.25m rocket engine (exhaust compensation still exists, regardless of propellant).

Scale the 250 so its a more direct Mainsail counterpart to the 125's LV-T