Download all items for given track

Did some quick searching and I see that the ability to download all items for a given track isn't currently in the CLI.

I'd really find this item useful, as it's great to have access to items to work on during a long flight etc.

In the mean time (because I've been searching for it in the issues here) I made a tiny script to be able to download all items for a given track: https://github.com/Jarvvski/exercism-downloader