Maintenance (#129)

* add test set example for dstc9 (multiwoz_zh, crosswoz_en)

* update new_goal_model.pkl

* update crosswoz auto_sys_template_nlg

* add postcode as special case for NLU tokenization

* fix lower case for int value in nlg.py

convlab2/nlg/template/multiwoz/nlg.py

@@ -200,6 +200,7 @@ class TemplateNLG(NLG):
                 sentences += sentence
             else:
                 for slot, value in slot_value_pairs:
+                    if isinstance(value, str):
                         value_lower = value.lower()
                     if value in ["do nt care", "do n't care", "dontcare"]:
                         sentence = 'I don\'t care about the {} of the {}'.format(slot, dialog_act.split('-')[0])