Beta content

:warning: Not ready for merging!

Just wanted to start this thread up. Still to do:

- [x] Progress graphs
  - [ ] IE8 fallback needs some tweaking
- [ ] Beta banner
- [ ] Replace SVG with smaller bitmap images?
Hmm... can the cf-core `.superheader` be overridden by redeclaring it in cf-enhancements? Otherwise, I'm not sure how this would work.