Almost unheard of as a medium five years ago, podcasting was once relegated to being one of those pesky default iPhone apps that you couldn’t get rid of. However, thanks in part to massively popular shows like NPR’s This American Life, whose podcast Serial in 2014 introduced a whole range of people to the audio form, the podcasting world has gone from a slightly unpopular alternative to listening to music on a morning commute, to shows like Welcome To Night Vale, or My Dad Wrote A Porno selling out multiple nights in Dublin. This September, Irish podcasting network HeadStuff host…