add syntax highlight for *.vue component files

samples/Vue/basic.vue

@@ -0,0 +1,21 @@
+<style>
+.red {
+  color: #f00;
+}
+</style>
+
+<template>
+<div>
+  <h2 v-class="red">{{msg}}</h2>
+</div>
+</template>
+
+<script>
+module.exports = {
+  data: function () {
+    return {
+      msg: 'Hello from Vue!'
+    }
+  }
+}
+</script>