Fixes phoron reactions

What happened before:
Phoron and Oxygen burned up in a 3:2 ratio that was handled as a 1:2 one. In each tick it also generates as many carbon dioxide molecules as the entire reaction would create.
3 Ph + 2 Ox -> lots and lots of co2

What happens now:
Reaction gets consistently dealt as a 2:1 reaction and doesn't generate carbon dioxide out of literally nowhere.
2 Ph + 1 Ox -> 2 co2

Will probably also have the effect that reactions are much faster now, not taking as much time to burn as it does now. Has been tested with bombs; don't worry, everything still works.