def execute
      scripts = Dir.glob(File.join(@script_dir, @script_file))
      scripts.each do |script|
        list[script] = []
        if show_methods
          list[script] = retrieve_methods(script)
        end
      end
      list
    end
def execute
      scripts = Dir.glob(File.join(@script_dir, @script_file))
      scripts.each do |script|
        list[script] = []
        if show_methods
          list[script] = retrieve_methods(script)
        end
      end
      list
    end
Creates a new ScriptList. Takes params script_dir, script_file and show_methods
 Retrieves the information about scripts and methods from the script directory