[misc](repo): update repo asset

Author: Alex Jiang

README.md

@@ -19,6 +19,7 @@ A-J-Full-Screen-Image-Browser is an drop-in solution for full screen image and v
 - [x] Double tap to zoom all the way in and again to zoom all the way out
 - [x] Swipe to dismiss
 - [x] High level diagram
+- [x] MVVM architecture
 - [x] Easy to customise
 
 ## Requirements
@@ -31,6 +32,29 @@ A-J-Full-Screen-Image-Browser is an drop-in solution for full screen image and v
 
 - drag and drop the entire `A_J_Full_Screen_Image_Browser` into your project
 
+## Full Usage Example
+
+```swift
+import UIKit
+
+final class ViewController: UIViewController {
+
+    lazy var images: [ImageAsyncDownloadable] = {
+        return [SingleImage(imageURL: URL(string: "https://images.unsplash.com/photo-1445264918150-66a2371142a2?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=79730c9ec106e3ccee026c648c624e5f&auto=format&fit=crop&w=3800&q=80")!),
+                SingleImage(imageURL: URL(string: "https://images.unsplash.com/photo-1483086431886-3590a88317fe?ixlib=rb-0.3.5&s=96129ab02a4a277f5c27273d14323a9a&auto=format&fit=crop&w=3668&q=80")!)]
+    }()
+
+    lazy var urls = [URL(string: "https://images.unsplash.com/photo-1502899576159-f224dc2349fa?ixlib=rb-0.3.5&s=4f3943a5d663f9bb062d7d380c8d6fdf&auto=format&fit=crop&w=3700&q=80")!,
+                     URL(string: "https://images.unsplash.com/photo-1445264918150-66a2371142a2?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=79730c9ec106e3ccee026c648c624e5f&auto=format&fit=crop&w=3800&q=80")!]
+
+    @IBAction func onButtonTapped(_ sender: UIButton) {
+        let vm = FullScreenImageBrowserViewModel(urls: urls)
+        let x = FullScreenImageBrowser(viewModel: vm)
+        present(x, animated: true, completion: nil)
+    }
+```
+
+
 ## Demo
 
 <p align="center">