def initialize(options={})
      @prs = SimpleTypedList.new BorderPr
      parse_options options
    end
Creates a new Border object
@option options [Boolean] diagonal_up
@option options [Boolean] diagonal_down
@option options [Boolean] outline
@example - Making a border
p = Axlsx::Package.new
red_border = p.workbook.styles.add_style :border => { :style => :thin, :color => "FFFF0000" }
ws = p.workbook.add_worksheet
ws.add_row [1,2,3], :style => red_border
p.serialize('red_border.xlsx')

@note The recommended way to manage borders is with Style#add_style
@see Style#add_style