missing files and unfixed bugs

[QingyangZhang]

Dear authors,

Thanks for your efforts to release the code. However, it seems that some essential files are missing in this repo. For example, as mentioned in #11, it is not clear what evaluation metric is used. I can not find code to calculate the likelihood or accuracy. Besides, the bugs for other api models is unfixed. It will be greatly appreciated if you can help us to reproduce your awesome work.