notes

http://www.jianshu.com/p/cc1cb9a5650c

https://segmentfault.com/a/1190000003112509

https://segmentfault.com/a/1190000000372547

http://www.w3cplus.com/sassguide/syntax.html

http://web.jobbole.com/82992/

webstorm 忽略node模块 https://segmentfault.com/q/1010000006091426?_ea=1013542

gulp中文网 http://www.gulpjs.com.cn/docs/recipes/running-tasks-in-series/