text: import Vue from 'vue';
  import { MdField ,
      MdButton,
      MdCard,
      MdTable,
      MdEmptyState,
      MdContent,
      MdRipple,
      MdList,
      MdMenu,
      MdDialog,
      MdProgress,
      MdSnackbar,
      MdTabs,
      MdSwitch,
      MdDivider,
      MdSubheader ,
      MdAvatar,
      MdTooltip,
      MdDatepicker
  } from 'vue-material/dist/components';
  
  Vue.use(MdField)
  Vue.use(MdButton)
  Vue.use(MdCard)
  Vue.use(MdTable)
  Vue.use(MdEmptyState)
  Vue.use(MdContent)
  Vue.use(MdRipple)
  Vue.use(MdList)
  Vue.use(MdMenu)
  Vue.use(MdDialog)
  Vue.use(MdProgress)
  Vue.use(MdSnackbar)
  Vue.use(MdTabs)
  Vue.use(MdSwitch)
  Vue.use(MdDivider)
  Vue.use(MdSubheader)
  Vue.use(MdAvatar)
  Vue.use(MdTooltip)
  Vue.use(MdDatepicker)
  