http://blog.csdn.net/sinat_26917383/article/details/54850933
http://www.oschina.net/news/76286/facebook-fasttex
http://www.cnblogs.com/Jezze/archive/2011/12/23/2299884.html
fasttext原理
原文:http://www.cnblogs.com/ljygoodgoodstudydaydayup/p/7220459.html