lesson: stick sidebar no jump, close #40
Merge branch 'master' of github.com:CartoDB/academy
Aligns star in the logo
adds video to course1 lesson1
Merge branch 'master' of github.com:CartoDB/academy

* 'master' of github.com:CartoDB/academy:
  adds video to course1 lesson1
Merge pull request #57 from CartoDB/logo-fix

Align star in the logo
Merge branch 'master' into gh-pages

* master:
  adds video to course1 lesson1
  Aligns star in the logo
  lesson: stick sidebar no jump, close #40
Merge branch 'master' into gh-pages

* master: