Arboreal Additions

Arboreal Additions v1.4:
- Added Small and Large Ferox that will always stay in their respective form.
- Added all modded aberrant creatures: 5% spawn chance in place of their normal variant
Additional spawn weights:
- Mothling: 15% spawn chance in place of Lymantria
- Amargasaurus: 20% spawn chance in place of Diplodocus
- Andrewsarchus: 15% spawn chance in place of Equus
- Ember Crystal Wyvern: 20% spawn chance in place of Fire Wyverns
- Tropical Crystal Wyvern: 20% spawn chance in place of Lightning Wyverns
- Blood Crystal Wyvern: 20% spawn chance in place of Poison Wyverns
- Deinonychus: 15% spawn chance in place of Raptors
- Dinopithecus: 20% spawn chance in place of Gigantopithecus
- Sinomacrops: 30% spawn chance in place of Dimorphodons
- Tropeognathus: 15% spawn chance in place of Pteranodons