title: exclude directories in webpack loader
body: <p>I'm attempting to use css-modules in my webpack project but I'm also using some css from packages in <code>node_modules</code>. How do I write a loader(s) to only use modules in my <code>module</code> directory and not in the <code>node_modules</code> directory? I tried the following but it borks. It looks like it's trying to apply the modules stuff to the css in <code>node_modules</code>.</p>
  
  <pre><code>  {
      test: /\.css$/,
      loader: 'style!css-loader?modules&amp;importLoaders=1&amp;localIdentName=[name]__[local]___[hash:base64:5]',
      include: [
        path.resolve(__dirname, 'modules')
      ]
    },
    { 
      test: /\.css$/, 
      loader: 'style!css',
      include: [
        path.resolve(__dirname, 'node_modules')
      ]
    },
  </code></pre>