wepy 框架引入 vant-weapp UI 框架，其他框架类似

	// npm 安装 vant-weapp | git clone 源码包
	npm install vant-weapp -S

	// 将 vant-weapp/dist 复制到 components
	cp -r node_modules/vant-weapp/dist src/components/vant-weapp

	// 在页面配置中引用
	config = {
		usingComponents: {
			'van-button': '../components/vant-weapp/button/index'
		}
	};

	// 模板中使用
	<van-button type="default">按钮</van-botton>