Download strips from official website in high quality.
$ dilbert.sh [from] [to]
If [from] not specified - 16. 4. 1989 (first strip)
If [to] not specified - today
$ ./dilbert.sh - download all strips (from 16. 4. 1989)
$ ./dilbert.sh today - download today strip
$ ./dilbert.sh 2016-09-07 yesterday - download strips from 7. 9. 2016 to yesterday