Renamed from "Rabbits Galore!" to "Rabbit Season"

Several new biomes added for rabbits to spawn in

• sunflower plains: groups of 2-6 with a weight of 10
• savanna plateau: groups of 2-6 with a weight of 10
• swamp: groups of 2-4 with a weight of 8
• wooded badlands: groups of 2-4 with a weight of 8