Merge branch 'master' into dev

convlab2/util/multiwoz/dbquery.py

data/crosswoz/extract_all_ontology.py

data/crosswoz/extract_all_value.py

data/crosswoz/gen_ontology.py

data/crosswoz/train.json.zip

data/crosswoz/val.json.zip

data/crosswoz_en/.gitignore

data/crosswoz_en/dstc9_testset_example.json

data/multiwoz/db/hospital_db.json

data/multiwoz/db/police_db.json

data/multiwoz/goal/new_goal_model.pkl

data/multiwoz/goal/new_goal_model_no_police_hospital.pkl

data/multiwoz_zh/dstc9_testset_example.json

setup.py

tests/test_BERTNLU-RuleDST-RulePolicy-SCLSTM.py

tests/test_end2end.py