Supermatter Tweak
- O2 Primary mode now actually works.
- O2 has to be at least 15% (instead of previous 400%, WTF?) of core composition to actually have any effect on the core, considering all remaining gas is N2 (so realistically it's somewhere around 13-14%)
Adds two mwerezak's requests.
Merge pull request #6437 from atlantiscze/Supermatter-O2-Fix

Supermatter Tweak