Argonaut:
https://github.com/stacycurl/pimpathon/blob/master/src/main/scala/pimpathon/argonaut.scala
https://github.com/stacycurl/pimpathon/blob/master/src/test/scala/pimpathon/argonautTests/TraversalFrills.scala

IO:
https://github.com/stacycurl/pimpathon/blob/master/src/test/scala/pimpathon/file.scala