Add Async image loading

Examples/Async image loading/RemoteImage/RemoteImage.swift

@@ -0,0 +1,37 @@
+//
+//  RemoteImage.swift
+//  Landmarks
+//
+//  Created by Callum Trounce on 06/06/2019.
+//  Copyright © 2019 Apple. All rights reserved.
+//
+
+import Foundation
+import SwiftUI
+import Combine
+
+@available(iOS 13.0, *)
+class RemoteImage: BindableObject {
+
+    var didChange = PassthroughSubject<Image?, Never>()
+
+    typealias PublisherType = PassthroughSubject<Image?, Never>
+
+    var image: Image? = nil {
+        didSet {
+            guard oldValue != image else { return }
+            DispatchQueue.main.async {
+                self.didChange.send(self.image!)
+            }
+        }
+    }
+
+    func load(url: URL) -> Self {
+        guard image == nil else { return self }
+        ImageLoader.shared.load(url: url) { [unowned self] (image) in
+            let final = Image.init(image, scale: 1, label: Text(url.lastPathComponent))
+            self.image = final
+        }
+        return self
+    }
+}