Update README.md

Merge pull request RUCAIBox#968 from 2017pxy/master

Update: update the version code

Update Sequential_recommendation.md

Update requirements.txt

Merge pull request RUCAIBox#553 from chenyushuo/master

Merge 0.1.x into master

Merge pull request RUCAIBox#483 from ShanleiMu/master

FEA: update readme and setuptools