Adds fossil cloning

Adds new feature: cloning animals and plants from fossils. Includes: 

- 13 discoverable prehistoric species to clone from fossils (including 5 brand new ones). 
- 11 discoverable prehistoric plants to clone from fossils (including 9 brand new ones). 
- New minigame that involves correctly ordering the genomes inside each genetic sequence to unlock an animal/plant. 
- Fossils are no longer ornamental. 
- Added satchel bag to make carrying around fossils easier. 
- Some prehistoric animals and plants may seem strangely familiar... while others may bring more than the erstwhile scientist bargains for.