Stalled threads during downloads.

[cleonyc]

When downloading more than one album at a time, after about 3-4 albums are done downloading, threads die from rate limits from the tidal servers, resulting in many albums only having certain songs be downloaded. I will be implementing an option to sleep between album downloads in a future PR.

Confirmed by @popeye2468 further in the comments on #26.

[MinisculeGirraffe]

I'm going to close this in favor of #29 you opened. I don't think a delay is the right way to go about it.

if you do want to edit one in, it should just be a call to tokio::sleep here

I don't know that it would be the best solution though for the reasons I specified in the other issue.