Replace Babel by Bublé #8

[thgh]

As Bublé does not offer the same functionality as Babel, I would actually suggest to make a new plugin: rollup-plugin-vue-buble.

EDIT: Actually, there is no need for Babel or Bublé at all. I will split off the Vue component stuff from the Babel/postcss/...

[znck]

@thgh The output slightly differs from expected. Expected output in tests should be updated.

      + expected - actual

      -var evens = [2,4,6,8]
      -var odds = evens.map(function (v) { return v + 1; })
      +var evens = [2, 4, 6, 8];
      +var odds = evens.map(function (v) {
      +  return v + 1;
      +});
       var style = { template: "<h1 :id=id @click=hi>hello</h1><input type=text>",
         data: function data() {
      -    return odds
      +    return odds;
         }
      -}
      +};