Hello again and welcome back to the first ever Travis Advent Calendar!
I'm sure you've got the idea by now, but if you're new to the calendar, all the days' links still work and so you can open them all on 24th December if you want. Alternatively squeeze some Travis into every day! (wouldn't the world be a better place if everyone did that :) )
I apologise for any technical problems, which have happened and will inevitably strike again. Please point them out so I can get them fixed quickly :)

Day 1 link
Day 2 link
Day 3 link
Day 4 link
Day 5 link
Day 6 link
Day 7 link
Day 8 link
Day 9 link
Day 10 link
Day 11 link
Day 12 link
Day 13 link