if no _id on save_objects obj, insert, else: save; client wont try to save_objects if objects is empty; drop_cube->cube_drop; add_user, user_add; got rid of some @memo caching for .cube/cube_fields; etl_activity now stores last update per object field; threadpool executor is shutdown at .stop()
Merge branch 'master' of github.com:drpoovilleorg/metrique