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