Host Visual Tests on Github pages

[avelinet]

• [x] Include compiled fixtures.css file
• [x] Ensure all the tests have a compiled css file
  • [x] Alert
  • [x] Align
  • [x] Arrange
  • [x] Breadcrumb
  • [x] Button
  • [x] Grid
  • [x] Media
  • [x] Ratio
  • [x] Stack