Documentation needed

[Jolanrensen]

Many of the functions in ApiV1.kt are undocumented at the moment.
We should probably copy over what the functions do from Spark itself, or maybe find an annotation that can pass through the documentation from the Spark to our API, so users get to see the docs when they're working with our API as well.

[Jolanrensen]

Working on it here: https://github.com/Jolanrensen/kotlin-spark-api/tree/more-documentation