added video in discover section
update people section styles
update default link color to brand-primary
put health-hackathon complement btn in paragraph
added fake people in health-pitch-challenge
remove Q&A in health-hackathon
added styles to default ul
updated last-edition video code (bootstrap responsive embed)
Merge branch 'gh-pages' of github.com:AlsaceDigitale/hhcamp_wip into gh-pages

* 'gh-pages' of github.com:AlsaceDigitale/hhcamp_wip:
  Create README.md