Add license to the files

database/__init__.py

database/actions.py

database/base.py

database/database_table.py

database/protocol.py

database/types.py

generate_schema.py

manage.py

mapping_functions/__init__.py

mapping_functions/table_manipulation.py

pnad_protocol_from_dic.py

protocols_comparison.py

settings.py

tests/__init__.py

tests/database_table_test.py