need to exec : npm install -g gulp

分支的搭建顺序(Branches set up order):

* less
* notify
* imagemin
* uglify
* clean
* rev {
	add: gulp-rev,gulp-rev-collector,gulp-sync
	"deploy" and "default" tasks combined into combo.js
	//使用此缓存部署机制需要静态服务器设置静态资源缓存永不过期
	//Using this cache way need to set static resource cache never expired by server
}