Update beginner/notebooks/NeXus/Nexus_from_publicationdata_nov.ipynb,...

Update beginner/notebooks/NeXus/Nexus_from_publicationdata_nov.ipynb, beginner/notebooks/NeXus/Nexus_manipulation.ipynb, beginner/notebooks/NeXus/nov_candidate1_copy.ipynb, beginner/notebooks/NeXus/nov_candidate1_newfiles.ipynb, beginner/notebooks/NeXus/.gitkeep, beginner/notebooks/datacite/.gitkeep, beginner/notebooks/datacite/DataCite_converter_MIT_examples.ipynb, beginner/notebooks/datacite/datacite-example-dataset-v4.xml, beginner/notebooks/datacite/datacite-nameType-v4.xsd, beginner/notebooks/datacite/datacite-relatedIdentifierType-v4.xsd, beginner/notebooks/datacite/datacite-titleType-v4.xsd, beginner/notebooks/datacite/test_datacite_dataset_fromxml_tojson_tocsv.ipynb, beginner/notebooks/datacite/test_datacite_xml_1.ipynb