Add PromiseKit dependency

- Added PromiseKit dependency

Carthage/Checkouts/PromiseKit/Extensions/AssetsLibrary/Tests/app.swift

@@ -0,0 +1,39 @@
+import PMKAssetsLibrary
+import AssetsLibrary
+import PromiseKit
+import UIKit
+
+@UIApplicationMain
+class App: UITableViewController, UIApplicationDelegate {
+
+    var window: UIWindow? = UIWindow(frame: UIScreen.main.bounds)
+    let testSuceededSwitch = UISwitch()
+
+    func application(_ application: UIApplication, willFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
+        window!.rootViewController = self
+        window!.backgroundColor = UIColor.purple
+        window!.makeKeyAndVisible()
+        UIView.setAnimationsEnabled(false)
+        return true
+    }
+
+    override func viewDidLoad() {
+        view.addSubview(testSuceededSwitch)
+    }
+
+    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        return 1
+    }
+
+    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        let cell = UITableViewCell()
+        cell.textLabel?.text = "1"
+        return cell
+    }
+
+    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+        _ = promise(UIImagePickerController()).done { (data: NSData) in
+            self.testSuceededSwitch.isOn = true
+        }
+    }
+}