GenerateDatasetsXml Improvements #389
Description
Refactor to make it possible to use reflection to add support for new dataset types, simplifying the process for adding a new dataset type.
As part of this it'd be good to standardize input/output of the generate datasets methods. In particular an option to provide json as input (instead of the question/answer approach) and consolidating the xml writing (and option for writing each dataset to it's own xml file for ease of using with SAXParser XInclude support).