content: import React from 'react'
  import { StackNavigator } from 'react-navigation'
  
  import tabNavigator from './tabNavigator'
  import ReadingScreen from './ReadingScreen'
  
  const navigator = StackNavigator(
    {
      Tab: {
        screen: tabNavigator
      },
      Reading: {
        screen: ReadingScreen
      }
    },
    {
      mode: 'modal',
      headerMode: 'none',
      navigationOptions: {
        gesturesEnabled: false
      }
    }
  )
  
  export default navigator
  