new update: coqa and quac
## News
+2019-15-05: Added [QuAC](https://github.com/facebookresearch/ParlAI/tree/master/parlai/tasks/quac), Question Answering in Context dataset, and [COQA](https://github.com/facebookresearch/ParlAI/tree/master/parlai/tasks/coqa), Conversational Question Answering Challenge datasets.
+
2019-05-03: The [What makes a good Conversation project page](https://parl.ai/projects/controllable_dialogue/) is now available with pretrained models.
2019-03-15: The [Wizard of Wikipedia project page](http://parl.ai/projects/wizard_of_wikipedia/) is updated with pretrained models and specialized model code.
