Xenoarchaeology

DON'T MERGE YET, additional fixes coming. PR recreated for feedback and review. Fixes TBD: 
- Add circuitboard. 
- Resolve issues locating cloning pod. 
- Rework create_all_genesequences() to ignore calling context. 

Adds new feature: cloning animals and plants from fossils. Features: 
- 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.

Map has not been updated to avoid merge conflicts. I'll make a separate PR for that once this has been accepted.