add contributor Qian Shaofeng

The author of BipolarSlopeOneRecommender

README.md

@@ -113,7 +113,7 @@ public void main(String[] args) throws Exception {
 
 ### Acknowledgement
 
-We would like to express our appreciation to the following people for contributing source codes to LibRec, including [Prof. Robin Burke](http://josquin.cti.depaul.edu/~rburke/), [Bin Wu](https://github.com/wubin7019088), [Diego Monti](https://github.com/dmm42), [Ge Zhou](https://github.com/466152112), Li Wenxi, [Marco Mera](https://github.com/mmera), [Ran Locar](https://github.com/ranlocar), [Shawn Rutledge](https://github.com/shawndr), [ShuLong Chen](https://github.com/ChenSuL), [Tao Lian](https://github.com/taolian), [Takuya Kitazawa](https://github.com/takuti), [Zhaohua Hong](mailto:[email protected]), Tan Jiale, [Daniel Velten](https://github.com/dvelten), etc.  We gratefully thank Mr. Lijun Dai for designing and contributing the logo of LibRec, and also many thanks to [Mr. Jianbin Zhang](http://www.liaotian2020.com/) for implementing and sharing a [LibRec demo](http://demo.librec.net/). 
+We would like to express our appreciation to the following people for contributing source codes to LibRec, including [Prof. Robin Burke](http://josquin.cti.depaul.edu/~rburke/), [Bin Wu](https://github.com/wubin7019088), [Diego Monti](https://github.com/dmm42), [Ge Zhou](https://github.com/466152112), Li Wenxi, [Marco Mera](https://github.com/mmera), [Ran Locar](https://github.com/ranlocar), [Shawn Rutledge](https://github.com/shawndr), [ShuLong Chen](https://github.com/ChenSuL), [Tao Lian](https://github.com/taolian), [Takuya Kitazawa](https://github.com/takuti), [Zhaohua Hong](mailto:[email protected]), Tan Jiale, [Daniel Velten](https://github.com/dvelten), [Qian Shaofeng](https://github.com/shitou112), etc.  We gratefully thank Mr. Lijun Dai for designing and contributing the logo of LibRec, and also many thanks to [Mr. Jianbin Zhang](http://www.liaotian2020.com/) for implementing and sharing a [LibRec demo](http://demo.librec.net/). 
 
 We also appreciate many others for reporting bugs and issues, and for providing valuable suggestions and support.