v0.8.0 - The Speciation Release

• New breathing code: With the new chemistry system, narjillos can live and reproduce off atmosphere chemicals alone, even without ever touching food. As a result, the dish now has different ecological niches, and you can have different species with different survival strategies co-existing in the dish. Typically, some species will survive by hunting for food, while others will spare energy and survive by breathing.
• Grab-bag: The usual bunch of small fixes and changes.