Added method called get_user_metadata that takes an object_id and returns two dictionaries:  one for listable metadata and one for non-listable metadata
Added method called get_user_metadata that takes an object_id and returns two dictionaries:  one for listable metadata and one for non-listable metadata
ab24v07/atmos-python,lweeks/atmos-python,chadlung/atmos-python,MrBasset/atmos-python