Add the standalone HaskellerZ meetup presentations

[beerendlauwers]

HaskellerZ holds the ZuriHac hackathon, but they also have regular meetups during which someone gives a presentation. We need to go over the list (https://github.com/meiersi/HaskellerZ) and add them. Perhaps we can add the standalone ones in a series like "HaskellerZ 2016 meetups" if there are several.

[beerendlauwers]

I've also added a few of the ZuriHac 2015 presentations already.