src/components/MdMenu/index.js
import material from 'vue-material/material'
import MdMenu from './MdMenu'
import MdMenuContent from './MdMenuContent'
import MdMenuItem from './MdMenuItem'
export default Vue => {
material(Vue)
Vue.component(MdMenu.name, MdMenu)
Vue.component(MdMenuContent.name, MdMenuContent)
Vue.component(MdMenuItem.name, MdMenuItem)
}