title: Cannot find module precss
body: <p>I was trying to get react-toolbox to run. 
  Got the error 'Cannot find module precss' but this is the same code I picked up from the site. Am I missing out on something?</p>
  
  <p>postcss.config.js</p>
  
  <pre><code>module.exports = {
      plugins: [
          require('precss'),
          require('autoprefixer')
      ]
  }
  </code></pre>
  
  <p>webpack.config.js</p>
  
  <pre><code>var HTMLWebpackPlugin = require('html-webpack-plugin');
  var HTMLWebpackPluginConfig = new HTMLWebpackPlugin({
      template: __dirname + '/app/index.html',    
      filename: 'index.html',
      inject: 'body'
  });
  
  module.exports = {
  
      entry: __dirname + '/app/index.js',
      module: {
          loaders: [
              {
                  test: /\.js$/,
                  exclude: /node_modules/,
                  loader: 'babel-loader'
              },
              {
                  test: /\.css$/,
                  loaders: [
                      'style-loader',
                      'css-loader?importLoaders=1',
                      'postcss-loader'
                  ]
              }
  
          ]
      },
      output: {
          filename: 'transformed.js',
          path: __dirname+'/build'
      },
      plugins: [HTMLWebpackPluginConfig]
  };
  </code></pre>
  
  <p>Any thoughts?</p>