[Merge] ~racb/ubuntu-sponsoring:python3 into ubuntu-sponsoring:master

[Benjamin Drung]

Review: Needs Fixing

I took your branch, rebased it on master, included the change request from Dan, and added a work-in-progress commit to switch to Python 3. The result is pushed to the python3 branch: https://code.launchpad.net/~ubuntu-dev/ubuntu-sponsoring/+git/ubuntu-sponsoring/+ref/python3
-- 
https://code.launchpad.net/~racb/ubuntu-sponsoring/+git/ubuntu-sponsoring/+merge/418022
Your team Ubuntu Development Team is subscribed to branch ubuntu-sponsoring:master.