Add license.

LICENSE

examples/get_spectr.py

examples/test.py

examples/upconversion.py

snlohelper/base_function.py

snlohelper/focus.py

snlohelper/functions.py

snlohelper/import_snlo_file.py

snlohelper/main_window.py

snlohelper/mix_methods.py

snlohelper/ref_index.py

snlohelper/snlo.py

snlohelper/two_d_mix_lp.py

snlohelper/two_d_mix_sp.py

snlohelper/utils.py