:::~ (CT) fixed behaviour in spg-worker, which didn't run when launched with dry environmental variables
	modified:   scripts/spg-master.py
	modified:   scripts/spg-worker.py
	modified:   spg/__init__.py
	modified:   spg/queue/base.py
:::~ (CT) bug prevented spg-results to run: one __close_db where not needed

	modified:   spg/cmdline/ensembledb.py
	modified:   spg/parameter/ensemble.py
:::~ spg-results work again
	modified:   spg/parameter/ensemble.py
	modified:   spg/parameter/atom.py
	modified:   spg/parameter/paramdb.py
	modified:   spg/utils/check_params.py
	modified:   spg/utils/check_params.py
	modified:   spg/master/masterdb.py
	modified:   spg/parameter/atom.py
	modified:   spg/parameter/ensemble.py
	modified:   spg/utils/tools.py
	modified:   examples/random-walk-cpp/conf.stdout
	modified:   examples/random-walk-cpp/main.cxx
	modified:   examples/random-walk-py/conf.stdout
	modified:   examples/random-walk-py/cts-random-walk.py
	modified:   scripts/spg-worker.py
	modified:   spg/parameter/atom.py
	modified:   spg/parameter/ensemble.py
	modified:   spg/parameter/paramdb.py
	modified:   spg/utils/check_params.py