Reorganized code as a pkg

src/dcc_quantities/__init__.py

src/dcc_quantities/abstract_dcc_types.py

src/dcc_quantities/dcc_chars_xml_list.py

src/dcc_quantities/dcc_formula_type.py

src/dcc_quantities/dcc_name.py

src/dcc_quantities/dcc_no_quantity.py

src/dcc_quantities/dcc_quantity_parser.py

src/dcc_quantities/dcc_quantity_table.py

src/dcc_quantities/dcc_quantity_type.py

src/dcc_quantities/dcc_rich_content_type.py

src/dcc_quantities/helpers.py

src/dcc_quantities/parse_uncertainties.py

src/dcc_quantities/si_complex_list.py

src/dcc_quantities/si_hybrid.py

src/dcc_quantities/si_list.py

src/dcc_quantities/si_real_list.py

tests/test_dcc_chars_xml_list.py

tests/test_dcc_name.py

tests/test_dcc_no_quantity.py

tests/test_dcc_quantity_type.py