REST API access to READ datasets

[arsh1]

Pretty self explanatory - would be great to be able to stream a dataset, or grab a specified number of rows. This would also require the ability to query the # of rows, size of dataset etc, column types etc. somewhat related to this feature request: https://support.powerbi.com/forums/265200-power-bi/suggestions/7059563-create-a-part-download-of-datasets