Add minimum viable product

SPAppDelegate.m

@@ -0,0 +1,16 @@
+#import "SPAppDelegate.h"
+#import "SPRootViewController.h"
+@import UIKit;
+@import QuartzCore;
+
+@implementation SPAppDelegate
+
+- (void)applicationDidFinishLaunching:(UIApplication *)application {
+  _window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
+  _rootViewController = [[UINavigationController alloc]
+      initWithRootViewController:[[SPRootViewController alloc] init]];
+  _window.rootViewController = _rootViewController;
+  [_window makeKeyAndVisible];
+}
+
+@end