Usage: nugget <urls> [options]
  -o, --output     output filename
  -d, --dir        output parent directory
  -c, --continue   resume aborted download
  -f, --force      ignore response codes > 299
  -s, --sockets    concurrent socket limit (default infinity)
  -q, --quiet      disable logging
  --proxy          specify a proxy to use
  --no-strict-ssl  disable strict SSL cehcking
