Add the "24 Days of X" as articles and series

[beerendlauwers]

• http://conscientiousprogrammer.com/blog/2015/11/30/haskell-tidbits-24-days-of-hackage-2015-day-1-introduction-and-stack/
• https://ocharles.org.uk/blog/

Note: Sometimes, the posts themselves refer to additional articles and videos. We should add these too.