More reliable strategy for getting deepmost component + addition of refresh() method + example & documentation on asynchronous updates

examples/vuex-async/App.vue

@@ -0,0 +1,7 @@
+<template>
+  <div id="app">
+    <h1>vuex-async</h1>
+    <router-view></router-view>
+    <p>Inspect Element to see the meta info</p>
+  </div>
+</template>