[#20] Fix tabulator usage
[#20] Fix tabulator usage

okfn/datapackage-py,okfn/datapackage-model-py,datapackages/datapackage-py,okfn/datapackage-py,sirex/datapackage-py,okfn/datapackage-model-py,datapackages/datapackage-py,sirex/datapackage-py