React Native Camera Roll Picker Versions Save

Fixed Warning: 'Using <Image> with children is deprecated' : https://github.com/jeanpan/react-native-camera-roll-picker/pull/61

fix prop_types : https://github.com/jeanpan/react-native-camera-roll-picker/pull/57

https://github.com/jeanpan/react-native-camera-roll-picker/pull/45

Migrating from React.PropTypes

Include following updates:

1. Add optional emptyText prop for when list is empty
2. Optimization: selecting image would not re-render ListView.