v0.2.7a — Substrate: Emergence Steam update #54109

I've continued working on getting the simulation stable in the long term. Performance still drops but I'm pretty sure that it's from slime mold's being unbalanced now, so I'll be working on that next. I ran the simulation over night last night and found some more GC leaks, and fixed most of it today. I haven't had a chance to run it for very long, but so far memory use is noticeably lower and doesn't climb nearly as much, so I think it's a big improvement there. I'll have to run it again overnight to confirm. New in v0.2.7:* Balance rework and fixes: - Plasmodium network maintenance costs increased. Networks are no longer effectively immortal, overextended branches prune naturally - Substrate nutrient generation adjusted to produce more of a patchwork with greater nutrient variation - Explosive enzymes now deal damage at all pH levels - Crystalline + explosive combo now deposits substrat...