CDK-643: Initial draft of how to use maven with Kite

* Mostly this just documents the warning about how configuration files
  can be pulled into the build.
> The easiest way to start working with the Kite API is to use [Apache Maven]

I don't agree with this statement. Isn't the CLI the easiest way to interact with Kite? It performs the same tasks, but doesn't require maven. I think the maven docs need to cover why you would use maven, besides it being easy: the fact that you can attach dataset-related tasks to your bulid lifecycle, like creating a dataset and then deploying an Oozie workflow that stores data in it.