Feature/esim quora tutorial (#766)
Feature/esim quora tutorial (#766)

* refactor cdssm tutorial (#694)

* refactor dssm tutorial (#705)

* refactor cdssm tutorial for branch master (#708)

* fix cron CI

* add esim tutorial for quora dataset

* add acc callback to categorical task

* undo the requirement changes

faneshion/MatchZoo,faneshion/MatchZoo