Added end_timestamp and total_time to the learner_result_dict_base in experiments.py; these values now appear in the .results and .results.json file in addition to start_timestamp
Added end_timestamp and total_time to the learner_result_dict_base in experiments.py; these values now appear in the .results and .results.json file in addition to start_timestamp

ernfrid/skll,ernfrid/skll