Backports commit: Prefixed built in controllers to better avoid conflicts with people's custom code

Conflicts:
	src/Umbraco.Web.UI/Umbraco/PartialViewMacros/Templates/EditProfile.cshtml
	src/Umbraco.Web.UI/Umbraco/PartialViewMacros/Templates/Login.cshtml
	src/Umbraco.Web/Controllers/UmbLoginController.cs
	src/Umbraco.Web/Controllers/UmbLoginStatusController.cs
	src/Umbraco.Web/Controllers/UmbProfileController.cs
	src/Umbraco.Web/Controllers/UmbRegisterController.cs
	src/Umbraco.Web/Umbraco.Web.csproj

src/Umbraco.Web/Controllers/UmbLoginStatusController.cs

@@ -0,0 +1,30 @@
+using System.Linq;
+using System.Web.Mvc;
+using System.Web.Security;
+using umbraco.cms.businesslogic.member;
+using Umbraco.Web.Models;
+using Umbraco.Web.Mvc;
+
+namespace Umbraco.Web.Controllers
+{
+    public class UmbLoginStatusController : SurfaceController
+    {
+        [HttpPost]
+        public ActionResult HandleLogout([Bind(Prefix = "loginStatusModel")]LoginStatusModel model)
+        {
+            if (ModelState.IsValid == false)
+            {
+                return CurrentUmbracoPage();
+            }
+
+            if (HttpContext.User != null && HttpContext.User.Identity.IsAuthenticated)
+            {
+                FormsAuthentication.SignOut();
+            }
+
+            //TODO: Shouldn't we be redirecting to the current page or integrating this with the 
+            // normal Umbraco protection stuff?
+            return Redirect("/");
+        }
+    }
+}