New port for Kotlin (multiplatform) #758

I needed to create a pure kotlin port for a MKP library, which I've done, and figured I could contribute it back to the main project.

This is a direct kotlin port of the java library.

I've got it set up to go under the ./kotlin sub directory (attempting to follow the language convention), but it's independent of the rest of the project and could be called whatever makes sense.

This ticket is being set up in accordance with the contributing guidelines, and to allow discussion before someone has to review a PR.