完善H5 gulp

 {{#content}}
+    {{log this}}
     {{! 头部banner}}
     {{#bannerTop}}
         {{> channel/banner-top}}

@@ -51,6 +51,7 @@
     "postcss-crip": "^2.0.0",
     "postcss-opacity": "^3.0.0",
     "postcss-position": "^0.4.0",
+    "postcss-pxtorem": "^3.3.1",
     "postcss-short": "^1.4.0",
     "postcss-sprites": "^3.1.2",
     "postcss-use": "^2.0.2",

@@ -15,7 +15,7 @@ const sourcemaps = require('gulp-sourcemaps');
 const cssnano = require('gulp-cssnano');
 
 const webpack = require('webpack');
-const webpackDevServer = require('webpack-dev-server');
+const WebpackDevServer = require('webpack-dev-server');
 const webpackConfig = require('./webpack.config.js');
 
 const env = {
@@ -52,6 +52,8 @@ const postcssPlugin = (et) => {
 
                 group = group === '' ? 'yo' : group;
 
+                file.retina = true;
+
                 return group ? Promise.resolve(group) : Promise.reject(group);
             }
         },
@@ -91,6 +93,13 @@ const postcssPlugin = (et) => {
         require('postcss-assets')(assets),
         require('postcss-calc'),
         require('postcss-opacity'),
+        require('postcss-pxtorem')({
+            rootValue: 40,
+            unitPrecision: 5, // 保留5位小数字
+            minPixelValue: 2, // 小于 2 时，不转换
+            selectorBlackList: [], // 选择器黑名单，可以使用正则
+            propWhiteList: [] // 属性名称为空，表示替换所有属性的值
+        }),
 
         // 可选
         require('postcss-use')({
@@ -165,7 +174,7 @@ gulp.task('webpack-dev-server', () => {
         debug: true
     });
 
-    new webpackDevServer(webpack(devConfig), {
+    new WebpackDevServer(webpack(devConfig), {
         contentBase: '.',
         publicPath: '//localhost:8000/',
         hot: true,
@@ -185,7 +194,7 @@ gulp.task('webpack', () => {
     var proConfig = Object.assign({}, webpackConfig);
 
     proConfig.output.path = dist.js;
-    webpack(proConfig, (err, stats) => {
+    webpack(proConfig, (err) => {
         if (err) {
             throw new gutil.PluginError('webpack', err);
         }