Code review comment for lp:~raoul-snyman/ubuntu-packaging-guide/new-colours

Basically:
  - sudo apt-get install python-sphinx
  - bzr branch lp:ubuntu-packaging-guide
  - cd ubuntu-packaging-guide
  - <maybe "bzr merge lp:~raoul-snyman/ubuntu-packaging-guide/new-colours" to make use of Raoul's changes>
  - <make changes, figure out how to make use of https://launchpad.net/ubuntu-website/light-django-theme>
  - bzr commit
  - bzr push lp:~<username>/ubuntu-packaging-guide/rebranding
  - bzr lp-open
  - <click on "Propose for merging">