improve example partition
Merge remote-tracking branch 'upstream/development' into development
Merge pull request #45 from areshand/development

Remove #ERROR string
Fix SubmitPythonTransformationCommand for hierarchical data

Need to get table from hnode.  Can't just assume it's the base htable
from worksheet.
Shouldn't fail r2rml processing if column doesn't exist

When applying model to a different worksheet, it's possible a column
doesn't exist, so we should log an error, not crash.
Merge branch 'development'