[WIP] Kotlin support

[DVDAndroid]

[droidchef]

Till we are not sure that it isn't breaking anything let's not merge this in. I'd rather not provide support for something than to add error prone code in production.

I like your Settings page though, if you'd like to send that as a PR.

Also, please make sure you squash your commits, as it helps keep the git history clean and reviews are much more easier.