Incorporated code from previous SVN locations.

Specifically:

DataCleaner Kettle data source:
http://source.pentaho.org/svnkettleroot/plugins/datacleaner-kettle-datasource/

Kettle Data Profiling with DataCleaner:
http://source.pentaho.org/svnkettleroot/plugins/kettle-profiling-datacleaner/

Tests are still not passing, most likely due to changes in Kettle since
version 4.x which the old code was built for.