Less verbose verbosity: progress output per percentage

[colindean]

I've got a Docker build that uses peru inside it to bake in some data. I'm running peru with --verbose because I probably want to see everything, but I've realized that this ends up outputting A LOT of repeated log lines because of how peru is logging progress on downloads.

I want a verbosity level that will update progress for each percentage point, so a maximum of 100 lines of output, instead of the approx. 187,223 lines I get from one ~700 MB file in that Docker build.