Initial multiplatform build

Multiplatform/Shared/ContentView.swift

@@ -0,0 +1,21 @@
+//
+//  ContentView.swift
+//  Shared
+//
+//  Created by Maurice Parker on 6/27/20.
+//  Copyright © 2020 Ranchero Software. All rights reserved.
+//
+
+import SwiftUI
+
+struct ContentView: View {
+    var body: some View {
+        Text("Hello, world!").padding()
+    }
+}
+
+struct ContentView_Previews: PreviewProvider {
+    static var previews: some View {
+        ContentView()
+    }
+}