add syntax highlight for *.vue component files

samples/Vue/pre-processors.vue

@@ -0,0 +1,31 @@
+<style lang="stylus">
+font-stack = Helvetica, sans-serif
+primary-color = #999
+body
+  font 100% font-stack
+  color primary-color
+</style>
+
+<template lang="jade">
+div
+  h1 {{msg}}
+  comp-a
+  comp-b
+</template>
+
+<script lang="babel">
+import compA from './components/a.vue'
+import compB from './components/b.vue'
+
+export default {
+  data () {
+    return {
+      msg: 'Hello from Babel!'
+    }
+  },
+  components: {
+    'comp-a': compA,
+    'comp-b': compB
+  }
+}
+</script>