Added copyright statements and license.

LICENSE.txt

parser/parser-dl_poly/SimpleDL_POLYParser.py

parser/parser-dl_poly/dlPolyParser.py

parser/parser-dl_poly/libDlPolyParser.py

parser/parser-dl_poly/libMomo.py

parser/parser-dl_poly/setup_paths.py

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

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