ken_import_preview_v2 8-15
Merge remote-tracking branch 'origin/develop' into feature/ken_import_preview_v2
Fixed a few import issues

* return a database-compatible value from Boolean#parse_item
* don't special-case for class names in BaseConverter
* use correct header names in some warnings
* use sub-type of Directive in Control import
Merge pull request #220 from reciprocity/feature/ken_import_preview_v2

This pull request incorporates changes for Import Controls preview.  Enhances flexibility and errors on the boolean columns,especially Fraud