Add Async image loading

Examples/Time Travel/SwiftUITimeTravel/TodoList/TodoListView.swift

@@ -0,0 +1,43 @@
+import SwiftUI
+
+struct TodoListView : View {
+    
+    @EnvironmentObject var store: Store<TodoState>
+    
+    var body: some View {
+        ZStack {
+            NavigationView {
+                List(store.state.todoItems) { item in TodoListItemView(item: item) }
+                    .navigationBarTitle(Text("Todo List"))
+                    .navigationBarItems(trailing: Button(action: {
+                        withAnimation {
+                            self.store.dispatch(event: .startCreatingItem)
+                        }
+                    }, label: { Image(systemName: "plus.circle") })) }
+            
+            if store.state.isCreatingItem {
+                
+                ModalDimmingView()
+                
+                VStack {
+                    Spacer()
+                    AddItemView()
+                        .relativeWidth(1.0)
+                        .background(Color.white)
+                        .cornerRadius(12.0)
+                        .shadow(radius: 16.0)
+                        .padding()
+                    Spacer()
+                }
+                .transition(.move(edge: .bottom))
+            }
+        }
+    }
+}
+#if DEBUG
+struct TodoListView_Previews : PreviewProvider {
+    static var previews: some View {
+        TodoListView()
+    }
+}
+#endif