title: How to create a Spark Dataset from an RDD
body: <p>I have an <code>RDD[LabeledPoint]</code> intended to be used within a machine learning pipeline.  How do we convert that <code>RDD</code> to a <code>DataSet</code>?  Note the newer  <code>spark.ml</code> apis require inputs in the <code>Dataset</code> format.</p>