inspired by iscroll, and it has a better scroll perfermance
##如何构建 better-scroll的源码是基于webpack构建的
首先，clone项目源码
git clone https://github.com/ustbhuangyi/better-scroll.git安装依赖
cd better-scroll
npm install测试demo页
npm run dev打开浏览器访问如下地址, 查看效果
localhost:9090