Day 10 - Cleaning data

TODO: produce screenshot example at beginning, or actual CSV

ALSO: expand option type explanation (what is there is woefully inadequate)

ACTUALLY -- OPTIONS SHOULD COME LATER! Rewrite those examples to avoid it.

Skills: 2

Pre-reading: DRAFT:29.2.1, DRAFT:29.2.2, 4.2.1.3, 4.2.1.4, 4.2.1.5

THIS HAS TO BE SERIOUSLY RECONSIDERED, SINCE DEFAULT SANITIZATION IS QUITE DIFFERENT IN CSVs VS GOOGLE SHEETS.

TODO