added additional metadata to model-data element view. Fixed importer to work with multiple imports that reference one another. Added namespace to classifications and conceptual domains. Fixed a few minor bugs
adding functionality to store imports as assets
adding type to columns for related to. adding error information. adding classifications/conceptual domain marshaller for namespace
Merge branch 'develop' into feature/xsdImporterImprovements_round2
bug fixes RE: import, catalogue menu, and basedOn relationship
fixing unit test
ignore cosd files
Merge branch 'develop' into feature/xsdImporterImprovements_round2
Merge branch 'develop' into feature/xsdImporterImprovements_round2

Conflicts:
	ModelCatalogueCorePluginTestApp/grails-app/views/index.gsp
adding asset creation for xls imports
Merge branch 'develop' into feature/xsdImporterImprovements_round2
Merge branch 'feature/xsdImporterImprovements_round2' into develop