Added the Apache license headers.

nomadcore/archive/archive.py

nomadcore/archive/nomad_query.py

nomadcore/constants/elements.py

nomadcore/constants/structure_types.py

nomadcore/metainfo/calculate_metainfo_overrides.py

nomadcore/metainfo/load_metainfo.py

nomadcore/metainfo/local_metainfo.py

nomadcore/metainfo/model_metainfo.py

nomadcore/metainfo/normalize_metainfo.py

nomadcore/parsing/annotator.py

nomadcore/parsing/base_classes.py

nomadcore/parsing/basic_metainfo.py

nomadcore/parsing/caching_backend.py

nomadcore/parsing/coordinate_reader.py

nomadcore/parsing/csv_reader.py

nomadcore/parsing/gromos_topo_objects.py

nomadcore/parsing/local_backend.py

nomadcore/parsing/match_highlighter.py

nomadcore/parsing/md_data_access.py

nomadcore/parsing/metainfo_storage.py