added hawc2_input_writer + IEC_DLC 1.2-1-5 + tests

examples/02_generate_dlc_with_definition.py

examples/dlc_definition.py

examples/read-h2-hs2.py

tests/__init__.py

tests/run_main.py

tests/test_examples.py

wetb/dlb/__init__.py

wetb/dlb/hawc2_iec_dlc_writer.py

wetb/dlb/iec64100_1.py

wetb/dlb/tests/test_files/IEC64100-1_DLB_DTU_ref.xlsx

wetb/dlb/tests/test_iec64100_1_dlb.py

wetb/hawc2/hawc2_input_writer.py

wetb/hawc2/tests/test_files/__init__.py

wetb/hawc2/tests/test_files/dlc_definition.py

wetb/hawc2/tests/test_files/htc_input_table.xlsx

wetb/hawc2/tests/test_hawc2_input_writer.py