Added copyright statements and license.

parser/parser-gulp/generate_scala_testcode.py

parser/parser-gulp/main.py

parser/parser-gulp/runtests.py

parser/parser-gulp/setup_paths.py

parser/parser-gulp/spacegroups.py

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

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