Added HealthController to web project for IIS Ping to use

NzbDrone.Web/Controllers/HealthController.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Web;
+using System.Web.Mvc;
+
+namespace NzbDrone.Web.Controllers
+{
+    public class HealthController : Controller
+    {
+        //
+        // GET: /Health/
+
+        [HttpGet]
+        public JsonResult Index()
+        {
+            return Json("OK", JsonRequestBehavior.AllowGet);
+        }
+
+    }
+}