test: /.scss|.css$/,

   loader: ExtractTextPlugin.extract('style', 'css?sourceMap!postcss')

loader: ['style', 'css?sourceMap!postcss']

require('postcss-import')({addDependencyTo: bundler}),
        require('postcss-inline-comment')(),
        require('postcss-hexrgba'),
        require('postcss-size'),
        require('precss')(),
        require('css-mqpacker')(),
        require('autoprefixer')({
            browsers: ['last 2 version']
        })