# File lib/heroku/commands/bundles.rb, line 33
    def download
      fname = "#{app}.tar.gz"
      bundle = args.shift.strip.downcase rescue nil
      url = heroku.bundle_url(app, bundle)
      File.open(fname, "wb") { |f| f.write RestClient.get(url).to_s }
      display "Downloaded #{File.stat(fname).size} byte bundle #{fname}"
    end