title: Webpack generates big file
body: <p>Webpack generates too large a file<br>
  Webpack 2.x<br>
  Webpack experts, i now want to connect <code>css</code> in the<code>js</code> file<br>
  How i include</p>
  
  <pre><code>import 'bootstrap/dist/css/bootstrap-theme.min.css';
  import 'bootstrap-select/dist/css/bootstrap-select.min.css';
  import 'bootstrap-multiselect/dist/css/bootstrap-multiselect.css';
  import 'font-awesome/css/font-awesome.min.css';
  import 'angular-ui-notification/dist/angular-ui-notification.min.css';
  import 'slick-carousel/slick/slick.css';
  import 'slick-carousel/slick/slick-theme.css';
  
  import '../css/styles.css';
  import '../css/custom.css';
  import '../css/max-width_767.css';
  </code></pre>
  
  <p>webpack config</p>
  
  <pre><code>var glob = require('glob'),
      ngAnnotate = require('ng-annotate-webpack-plugin'),
      ExtractTextPlugin = require("extract-text-webpack-plugin");
  
  module.exports = {
      entry: __dirname + '/application/application.js',
      output: {
          path: __dirname + '/build',
          filename: 'bundle.js'
      },
      plugins: [
          new ngAnnotate({
              add: true,
          }),
          new ExtractTextPlugin({
              filename: '[name].css',
          })
      ],
      module: {
          loaders: [
              {
                  test: /\.js$/,
                  loader: 'babel-loader',
                  query: {
                      presets: ['babel-preset-es2015'].map(require.resolve)
                  },
                  exclude: /(node_modules|bower_components)/
              },
              {
                  test: /\.(png|woff|woff2|eot|ttf|svg|gif|jpg)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
                  loader: 'url-loader'
              },
              {
                  test: /\.css$/,
                  loader: 'style-loader!css-loader'
              }
          ]
      },
      node: {
          fs: 'empty'
      }
  };
  </code></pre>
  
  <p>That's what i'm getting out of the way, a huge bundle.js file is probably 5 MB with all fonts, pictures, etc.</p>
  
  <p><code>bundle.js 5.53 MB 0 [emitted] [big] main</code></p>
  
  <p>I just want to concatenate only <code>css</code> and output to <code>bundle.css</code>  </p>
  
  <p>What am I doing wrong ?</p>