def create_script
        Dir.mkdir dir unless File.exists? dir
        @script_file = File.join(dir, script_name)
        unless File.exists? @script_file
          File.open(@script_file, 'w') do |f|
            if script_type == '.rb'
              f.print "def "
              f.puts  "#{method_name}" if method_name
              f.puts  "end"
            end
          end
        else
          if method_name and script_type == '.rb'
            File.open(@script_file, 'a') do |f|
              f.puts
              f.puts "def #{method_name}"
              f.puts "end"
            end
          end
        end
      end
def create_script
        Dir.mkdir dir unless File.exists? dir
        @script_file = File.join(dir, script_name)
        unless File.exists? @script_file
          File.open(@script_file, 'w') do |f|
            if script_type == '.rb'
              f.print "def "
              f.puts  "#{method_name}" if method_name
              f.puts  "end"
            end
          end
        else
          if method_name and script_type == '.rb'
            File.open(@script_file, 'a') do |f|
              f.puts
              f.puts "def #{method_name}"
              f.puts "end"
            end
          end
        end
      end
Creates a script file if it doesn't exist and adds an empty method with the provided
 method name. When file exists and method name is provided the method is appended to the
 existing file. Note: it is not checked whether method name already exists.