Change TPAGB::IsSupernova() so that stars with base of AGB core masses below MCBUR1 remain on the TPAGB until they make WDs; remove ResolveTypeIIaSN() functionality.
Add --evolve-main-sequence-mergers option which allows for main sequence merger products to continue evolution
Update HG::CalculateRadialExtentConvectiveEnvelope() to use a combination of Hurley & Picker to avoid excessively high convective envelope densities