Read-write for go_fish game

gistfile1.rb

  def save(game)
    File.open(game.key, 'w') do |file|
      file.write(game.to_yaml)
    end
  end

  def retrieve(game_id)
    File.open(game_id, 'r') do |file|
      YAML::load(file)
    end
  end