Bioinformatics python capstone lesson

This lesson is intended to be a 1.5 hour demo that will sit at the end of a novice python bootcamp and show learners how to apply some of their new skills to bioinformatics. Currently work in progress, contributions/suggestions very welcome!
Hmmmmm. I like interconnection among lessons, but I'm not sure where this readings.py comes from! Maybe linkout in case that wasn't something covered in this bootcamp so far?