email refacts trying to use creds

+ Admin user deletion from user list
+ Admin send email confirmation message from user list
+ WebSocket minor change

src/Yavsc.Server/ViewModels/Account/UnregisterViewModel.cs

@@ -2,6 +2,7 @@ namespace Yavsc.ViewModels.Account
 {
     public class UnregisterViewModel
     {
+        public string UserId { get; set; }
         public string ReturnUrl { get; set; }
 
     }