webpack下require('art-template')打包时fs报错
#### 错误

```
ERROR in ./~/art-template/node/_node.js
Module not found: Error: Cannot resolve module 'fs' in E:\personal\nicUI\node_modules\art-template\node
 @ ./~/art-template/node/_node.js 1:9-22
```
#### webpack配置

```
'use strict';

var path = require('path');
var webpack = require('webpack'); 

module.exports = {
    entry: [
        './src/js/main.js'
    ],
    resolve: {
        modulesDirectories: [
            'node_modules',
            'lib'
        ],
        alias: {
            jquery: "jquery1.10.2.js"
        }
    },
    externals: {
        jquery: 'jQuery'
    },
    output: {
        path: __dirname + "/dest/js/",
        filename: "[name].js"
    }
};
```
#### 引用

`var template   = require('art-template')`
