Feature/english (#381)

* perf[navbar]: set langSelect to component && refine errorLog component

* feat[login]:add 18n to login form

* fix[pagination]: fixed when selected page-sizes

* perf[i18n]:dashboard document svg permission

* perf[charts]: perf effect

* perf[i18n]:excel && zip

* perf[i18n]: table && errorLog && theme

* perf[i18n]: components

* perf[i18n]: direct use $t

* perf[i18n]: complex-table

* update README.md

* update README.md 📘

* perf[i18n]: refine code comments

src/errorLog.js

@@ -3,7 +3,10 @@ import store from './store'
 
 // you can set only in production env show the error-log
 // if (process.env.NODE_ENV === 'production') {
+
 Vue.config.errorHandler = function(err, vm, info, a) {
+  // Don't ask me why I use Vue.nextTick, it just a hack.
+  // detail see https://forum.vuejs.org/t/dispatch-in-vue-config-errorhandler-has-some-problem/23500
   Vue.nextTick(() => {
     store.dispatch('addErrorLog', {
       err,
@@ -14,4 +17,5 @@ Vue.config.errorHandler = function(err, vm, info, a) {
     console.error(err, info)
   })
 }
+
 // }