Improves README instructions and readability

README.md

@@ -12,35 +12,50 @@ Discussion: https://discord.gg/RvFM97v
 * Easily render QR code images
 * Optionally embed a logotype
 
-<img src="https://raw.githubusercontent.com/awesomejerry/react-native-qrcode-svg/master/screenshot/android.png" width="150">
-<img src="https://raw.githubusercontent.com/awesomejerry/react-native-qrcode-svg/master/screenshot/ios.png" width="150">
+| Android | iOS |
+| - | - |
+| <img src="https://raw.githubusercontent.com/awesomejerry/react-native-qrcode-svg/master/screenshot/android.png" width="240"> | <img src="https://raw.githubusercontent.com/awesomejerry/react-native-qrcode-svg/master/screenshot/ios.png" width="240"> |
 
 ## Installation
 
-Please install react-native-svg first.
+Install dependency packages
+
+```bash
+yarn add react-native-svg react-native-qrcode-svg
+```
+Or
+```bash
+npm i -S react-native-svg react-native-qrcode-svg
 ```
-npm install react-native-svg --save
+
+If you are using `React Native 0.60.+` go to the folder **your-project/ios** and run `pod install`, and you're done. 
+
+If not, use one of the following method to link.
+
+## Link with `react-native link`
+
+If you are using `React Native <= 0.59.X`, link the native project:
+
+```bash
 react-native link react-native-svg
-npm install react-native-qrcode-svg --save
 ```
 
 ## Examples
 
-```
+```jsx
 import QRCode from 'react-native-qrcode-svg';
 
-//Simple usage, defaults for all but the value
+// Simple usage, defaults for all but the value
 render() {
   return (
     <QRCode
       value="http://awesome.link.qr"
     />
   );
 };
-
 ```
 
-```
+```jsx
 // 30px logo from base64 string with transparent background
 render() {
   let base64Logo = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAOEAA..';
@@ -53,10 +68,9 @@ render() {
     />
   );
 };
-
 ```
 
-```
+```jsx
 // 20% (default) sized logo from local file string with white logo backdrop
 render() {
   let logoFromFile = require('../assets/logo.png');
@@ -67,17 +81,18 @@ render() {
     />
   );
 };
-
 ```
 
-```
+```jsx
 // get base64 string encode of the qrcode (currently logo is not included)
 getDataURL() {
   this.svg.toDataURL(this.callback);
 }
+
 callback(dataURL) {
   console.log(dataURL);
 }
+
 render() {
   return (
     <QRCode
@@ -88,7 +103,6 @@ render() {
 }
 ```
 
-
 ## Props
 
 Name            | Default    | Description
@@ -117,7 +131,8 @@ onError(error)  | undefined  | Callback fired when exception happened during the
 npm install --save react-native-fs
 
 ### Example for Android:
-```
+
+```js
 import { CameraRoll , ToastAndroid } from "react-native"
 import RNFS from "react-native-fs"
 ...