Added and configured iOS Extension project with ExtensionPreprocessingJS for webpage analysis.

src/iOS.Extension/AppDelegate.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Linq;
+using System.Collections.Generic;
+
+using Foundation;
+using UIKit;
+
+namespace Bit.iOS.Extension
+{
+    // The UIApplicationDelegate for the application. This class is responsible for launching the 
+    // User Interface of the application, as well as listening (and optionally responding) to 
+    // application events from iOS.
+    [Register("AppDelegate")]
+    public partial class AppDelegate : UIApplicationDelegate
+    {
+        // class-level declarations
+
+        public override UIWindow Window
+        {
+            get; set;
+        }
+
+        // This method is invoked when the application is about to move from active to inactive state.
+        // OpenGL applications should use this method to pause.
+        public override void OnResignActivation(UIApplication application)
+        {
+        }
+
+        // This method should be used to release shared resources and it should store the application state.
+        // If your application supports background exection this method is called instead of WillTerminate
+        // when the user quits.
+        public override void DidEnterBackground(UIApplication application)
+        {
+        }
+
+        // This method is called as part of the transiton from background to active state.
+        public override void WillEnterForeground(UIApplication application)
+        {
+        }
+
+        // This method is called when the application is about to terminate. Save data, if needed.
+        public override void WillTerminate(UIApplication application)
+        {
+        }
+    }
+}