AOPL -- Advent of Programming Languages

See http://adventofcode.com/2020 and https://github.com/myreg/aopl.

Problems and languages

Problem	language
01-stars	awk
02-password-philosophy	bash
03-toboggan-trajectory	clojure
04-passport-processing	d
05-binary-boarding	(WIP)
06-custom-customs	(TODO)
07-handy-haversacks	groovy