Added copyright statements and license.

LICENSE.txt

parser/parser-big-dft/bigdftparser/__init__.py

parser/parser-big-dft/bigdftparser/generic/libxc_codes.py

parser/parser-big-dft/bigdftparser/parser.py

parser/parser-big-dft/bigdftparser/scalainterface.py

parser/parser-big-dft/bigdftparser/setup_paths.py

...rser-big-dft/bigdftparser/versions/bigdft18/mainparser.py

regtests/bigdft_1.8/yaml_test/node_reader.py

regtests/bigdft_1.8/yaml_test/yaml_creator.py

regtests/bigdft_1.8/yaml_test/yaml_reader.py

regtests/regtests.py

setup.py

src/main/scala/eu/nomad_lab/parsers/BigDFTParser.scala

src/test/scala/eu/nomad_lab/parsers/BigDFTParserSpec.scala