updated nedrex package; added get_licence route

data/license.txt

drugstone/management/commands/populate_db.py

drugstone/management/includes/DatasetLoader.py

drugstone/urls.py

drugstone/views.py

python_nedrex/.github/ISSUE_TEMPLATE.md

python_nedrex/.gitignore

python_nedrex/python_nedrex/common.py

python_nedrex/python_nedrex/neo4j.py

python_nedrex/python_nedrex/static.py

python_nedrex/requirements.txt

python_nedrex/tests/test_python_nedrex.py

scripts/docker-entrypoint.sh