Add vue-router to dev deps

Revert router integration due to wrong merge

dev-example/main.js

@@ -1,14 +1,29 @@
 // The Vue build version to load with the `import` command
 // (runtime-only or standalone) has been set in webpack.base.conf with an alias.
 import Vue from 'vue'
+import VueRouter from 'vue-router'
 import App from './App.vue'
 import FormWizard from '../src/index'
+const First = { template: '<div>First page</div>' }
+const Second = { template: '<div>Second page</div>' }
+const Third = { template: '<div>Third page</div>' }
+
+const router = new VueRouter({
+  mode: 'history',
+  routes: [
+    { path: '/first', component: First },
+    { path: '/second', component: Second },
+    { path: '/third', component: Third }
+  ]
+})
+Vue.use(VueRouter)
 Vue.use(FormWizard)
 
 Vue.config.productionTip = false
 
 /* eslint-disable no-new */
 new Vue({
+  router,
   el: '#app',
   template: '<App/>',
   components: {App}