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!
I'd add what a bed file actually is/contains rather than represents. i.e. "data/cpg.bed cpg contains the locations of CpG islands in the human genome. It has 4 tab delimited columns containing the chromosome number, ???, ??? and ??"
Use 'head data/cpg.bed" to see the data format.