Better handling for incomplete downloads

[sjthespian]

I have just started trying this out, as I purchased a big bundle and was going crazy clicking on all of the items to download them individually. One thing I did notice, if the download fails (i.e. I had to kill the docker container), it sees the incomplete downloads as done and skips them when the container is rerun.

I would suggest downloading the files to a temporary name and then renaming them on completion. If the HumbleBundle download process allows resuming the download, that would even allow you to resume incomplete files, or at the very least restart them.