message: Add flat disabled Button story
diff: @@ -23,6 +23,14 @@ storiesOf('Button', module)
  )
  .add('Link Button', withInfo()(() => <Button href="#">Link</Button>))
  .add('Flat Button', withInfo()(() => <Button flat>Flat</Button>))
  + .add(
  + 'Flat Button disabled',
  + withInfo()(() => (
  + <Button flat disabled>
  + Flat
  + </Button>
  + ))
  + )
  .add(
  'Flat Button secondary',
  withInfo()(() => (
  