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
Avro and Parquet are efficient binary formats that work well with Hadoop. Snappy is a complimentary compression codec and is the default. You also state the default further down, so there is probably no need to mention snappy specifically. Just that Kite stores data in Avro or Parquet and those need to be read with Kite or Hue.