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
This should probably be a separate page, possibly combined with the Kite maven documentation. It would also be good to have an overview of the Kite data artifacts and what they provide.

* `kite-data-core` has the Kite data API, including all of the Kite classes used in this introduction. It also includes the Dataset implementation for file systems, both HDFS and local.
* `kite-data-hive` is a Dataset implementation that creates Datasets as Hive tables and stores metadata in the Hive MetaStore. Add a dependency on kite-data-hive if you want to interact with your data through Hive or Impala
* `kite-data-hbase` is an experimental Dataset implementation that creates datasets as HBase tables.
* `kite-data-mapreduce` provides MR input and output formats that read from or write to Kite datasets.
* `kite-data-crunch` provides helpers to use a Kite dataset as a source or target in a Crunch pipeline.