Update README.

Author: Xiaosong Gao

README.md

@@ -1,6 +1,7 @@
 # react-native-full-image-picker
 
 [![npm version](https://img.shields.io/npm/v/react-native-full-image-picker.svg?style=flat)](https://www.npmjs.com/package/react-native-full-image-picker)
+[![Build Status](https://travis-ci.org/gaoxiaosong/react-native-full-image-picker.svg?branch=master)](https://travis-ci.org/gaoxiaosong/react-native-full-image-picker)
 
 [中文说明](https://www.jianshu.com/p/4f7296753013)
 
@@ -43,12 +44,12 @@ Install by NPM:
 npm install --save react-native-full-image-picker
 ```
 
-You should also install native code of these libraries:
+**NOTICE**: This library has no native code for iOS and Android. But you should also install native code of these libraries:
 
-* [CameraRoll](https://facebook.github.io/react-native/docs/cameraroll)
-* [react-native-camera](https://github.com/react-native-community/react-native-camera)
-* [react-native-video](https://github.com/react-native-community/react-native-video)
-* [react-native-fs](https://github.com/itinance/react-native-fs)
+* [CameraRoll](https://facebook.github.io/react-native/docs/cameraroll): Used to get all photos in camera roll or photo library.
+* [react-native-camera](https://github.com/react-native-community/react-native-camera): Used to show camera in view.
+* [react-native-video](https://github.com/react-native-community/react-native-video): Used to preview the video.
+* [react-native-fs](https://github.com/itinance/react-native-fs): Used to copy generated photo or video to a temporary place.
 
 ## Usage
 
@@ -60,28 +61,64 @@ import * as ImagePicker from 'react-native-full-image-picker';
 
 It has three method:
 
-* `ImagePicker.getCamera(options)`: Take photo.
-* `ImagePicker.getVideo(options)`: Video recording.
-* `ImagePicker.getAlbum(options)`: Select from photo library.
+* `ImagePicker.getCamera(options)`: Take photo from camera. (Camera Mode)
+* `ImagePicker.getVideo(options)`: Video recording. (Video Mode)
+* `ImagePicker.getAlbum(options)`: Select photo or video from photo library. (Photo Mode)
 
 `options` is a object with these settings:
 
-* `callback: (data: any[]) => void`: Callback method with photo or video array. Do not use `Alert` in it.
-* `maxSize?: number`: The maximum number of photo count. Valid in camera or photo library.
+* `callback: (data: any[]) => void`: Callback method with photo or video array. `data` is an uri array of photo or video. Do not use `Alert` in this callback method.
+* `maxSize?: number`: The maximum number of photo count. Valid in camera or photo library mode.
 * `sideType?: RNCamera.Constants.Type`: Side of camera, back or front. Valid in camera or video.
 * `flashMode?: RNCamera.Constants.FlashMode`: Flash mode. Valid in camera or video.
 
 You can use [react-native-general-actionsheet](https://github.com/gaoxiaosong/react-native-general-actionsheet) to show `ActionSheet` by same API and UI with `ActionSheetIOS`.
 
-## Change Label
+## Change Default Property
 
-You can import page and change `defaultProps` to modify labels globally:
+You can import page and change `defaultProps` to modify settings globally:
 
 ```jsx
 import * as ImagePicker from 'react-native-full-image-picker';
 
-ImagePicker.XXXPage.defaultProps.xxx = yyy;
-ImagePicker.XXXView.defaultProps.xxx = yyy;
+ImagePicker.XXX.defaultProps.yyy = ...;
 ```
 
-The `XXXPage` or `XXXView` is the export items of library. And you can see source code to modify its `defaultProps` value.
+The `XXX` is the export items of library. Following is the detail.
+
+### PhotoModalPage
+
+This is the outter navigator for all modes. You can change these properties of `defaultProps`:
+
+| Name | Type | Description |
+| :-: | :-: | :- |
+| okLabel | string | OK button text |
+| cancelLabel | string | Cancel button text |
+| deleteLabel | string | Delete button text
+| useVideoLabel | string | UseVideo button text |
+| usePhotoLabel | string | UsePhoto button text |
+| previewLabel | string | Preview button text |
+| choosePhotoTitle | string | ChoosePhoto page title |
+| maxSizeChooseAlert | (num: number) => string | Max size limit alert message when choosing photos |
+| maxSizeTakeAlert | (num: number) => string | Max size limit alert message when taking photos from camera |
+
+### CameraView
+
+This is page for taking photos from camera or recording video. You can change these properties of `defaultProps`:
+
+| Name | Type | Description |
+| :-: | :-: | :- |
+| maxSize | number | Default max number limit |
+| sideType | RNCamera.Constants.Type | Camera side type. Default is `back` |
+| flashMode | RNCamera.Constants.FlashMode | Flash mode. Default is `off` |
+
+### AlbumListView
+
+This is page for selecting photo from photo library. You can change these properties of `defaultProps`:
+
+| Name | Type | Description |
+| :-: | :-: | :- |
+| maxSize | number | Default max number limit |
+| autoConvertPath | boolean | Auto copy photo or not to convert file path to standard file path. Default is `false` |
+| assetType | string | Asset type. Please see [CameraRoll Docs](https://facebook.github.io/react-native/docs/cameraroll) |
+| groupTypes | string | Group type. Please see [CameraRoll Docs](https://facebook.github.io/react-native/docs/cameraroll) |