DON'T MERGE: Csv2yaml

Converted lesson.csv files to lesson.yaml files in the original Data Analysis, Math Stat Boot Camp, and Open Intro Courses. Conversion script is in csv2yaml branch of swirl/swirl_misc.

The converted files *seem* to work. I've gone through Data Analysis, Central Tendency quickly but entirely, and pieces of other lessons. I wouldn't characterize testing as thorough, but I covered most of the question types, figures, videos, etc.

Sanity checks before merging advisable.