版本：2.0.0-beta.1
- https://cdn.bootcdn.net/ajax/libs/vue/2.0.0-beta.1/vue.common.js
- https://cdn.bootcdn.net/ajax/libs/vue/2.0.0-beta.1/vue.common.min.js
- https://cdn.bootcdn.net/ajax/libs/vue/2.0.0-beta.1/vue.js
- https://cdn.bootcdn.net/ajax/libs/vue/2.0.0-beta.1/vue.min.js