get rid of multiple window handling, add more logging, clean shutdown on ctrl+c, other tweaks
get rid of multiple window handling, add more logging, clean shutdown on ctrl+c, other tweaks

nlevitt/brozzler,nlevitt/brozzler,vonrosen/umbra,internetarchive/brozzler,internetarchive/brozzler,internetarchive/umbra,internetarchive/brozzler,vonrosen/umbra,nlevitt/brozzler,nlevitt/brozzler,nlevitt/brozzler,internetarchive/brozzler