http://markpop.github.io/2014/09/17/Gulp%E5%85%A5%E9%97%A8%E6%95%99%E7%A8%8B/
http://www.ydcss.com/archives/18
http://www.cnblogs.com/2050/p/4198792.html
gulp的一些坑
http://www.qiqiboy.com/post/61