Use streamed export on unwrapQuery
re-enable streaming exporter
Avoid data conversion for the NULL values case
- Use step meta class instead of hand-generated XML string
- Fixed streaming export functionality in Pentaho 5
[CDA-63]: Fixing the StreamExporter
Merge pull request #34 from pamval/master

[CDA-63]: StreamExporter
Merge branch 'master' of github.com:webdetails/cda