refactor[core]: use webpack-dev-server now (#355)

* bump deps: update vue-splitpane version

* refactor[chore]: use webpack-dev-serve build

* perf:settings

* doc: uodate readme

src/main.js

@@ -1,15 +1,23 @@
 import Vue from 'vue'
+
+import 'normalize.css/normalize.css'// A modern alternative to CSS resets
+
 import Element from 'element-ui'
 import 'element-ui/lib/theme-chalk/index.css'
-import i18n from './lang' // 国际化
+
+import '@/styles/index.scss' // global css
+
 import App from './App'
 import router from './router'
 import store from './store'
-import * as filters from './filters' // 全局filter
+
+import i18n from './lang' // Internationalization
 import './icons' // icon
 import './errorLog'// error log
-import './permission' // 权限
-import './mock' // 该项目所有请求使用mockjs模拟
+import './permission' // permission control
+import './mock' // simulation data generator
+
+import * as filters from './filters' // global filter
 
 Vue.use(Element, {
   i18n: (key, value) => i18n.t(key, value)