Replace new progress icons with the same ones the site uses

Test Plan:
- None
Use react with addons so React.addons is available

Test Plan:
- Make sure React.addons is available in console.
Implement subway icons and show progress

Test Plan:
- Went through each topic and made sure the correct colors are used for
  the video nodes.
- Non video nodes aren't being returned from the API yet, I have to
  figure that out later, and add code for the non-video progress icons at that
  point.