new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  from wdom.tag import NewTagClass as NewTag
  from wdom.tag import *
  
  
  css_files = [
      '//cdn.rawgit.com/alexanderGugel/papier/master/dist/papier-1.0.0.min.css',
  ]
  
  DefaultButton = NewTag('DefaultButton', 'button', Button, class_='bg-white')
  PrimaryButton = NewTag('PrimaryButton', 'button', Button, class_='bg-blue')
  SuccessButton = NewTag('SuccessButton', 'button', Button, class_='bg-light-blue')
  InfoButton = NewTag('InfoButton', 'button', Button, class_='bg-green')
  WarningButton = NewTag('WarningButton', 'button', Button, class_='bg-orange')
  DangerButton = NewTag('DangerButton', 'button', Button, class_='bg-red')
  LinkButton = NewTag('LinkButton', 'button', Button, class_='bg-cyan')
  
  Row = NewTag('Row', 'div', class_='row')
  Col1 = NewTag('Col', 'div', class_='col-1')
  Col2 = NewTag('Col', 'div', class_='col-2')
  Col3 = NewTag('Col', 'div', class_='col-3')
  Col4 = NewTag('Col', 'div', class_='col-4')
  Col5 = NewTag('Col', 'div', class_='col-5')
  Col6 = NewTag('Col', 'div', class_='col-6')
  Col7 = NewTag('Col', 'div', class_='col-7')
  Col8 = NewTag('Col', 'div', class_='col-8')
  Col9 = NewTag('Col', 'div', class_='col-9')
  Col10 = NewTag('Col', 'div', class_='col-10')
  Col11 = NewTag('Col', 'div', class_='col-11')
  
subject: Add papier css