Support downloading replays, both old and new.

@dhopkins-va @gholtslander-va 
There are a couple replays on prod that I want to download. I don't even need to merge this. If you are cool I'll just deploy it, download the replays, then re-deploy the master branch.

Hoping to use my "match recommendations" branch to decide the matches for next week based on the data collected over the past 4 weeks' games.