Moving Kite Dataset API info from old guide per CDK-753.

Link to the old guide from which this came. This is just shards of information brought forward so they're not lost. This info should be woven into the samples before 1.0.

http://kitesdk.org/docs/current/kite-data/guide.html
We don't need to list the API, just link to it and highlight that you get one by using its builder. The builder has a number of methods for adding a schema, a partition strategy, and a column mapping, as well as setting format and compression.