First pass at events almost buttoned up.

The goal is to get the members list to update when new users enter and leave the party.

Aurora/Design/Views/Party/PartyViewModel.cs

@@ -1,7 +1,7 @@
 using System;
 using System.Collections.ObjectModel;
 using Aurora.Executors;
-using Aurora.Proto;
+using Aurora.Proto.Party;
 using Xamarin.Forms;
 
 namespace Aurora.Design.Views.Party
@@ -32,6 +32,15 @@ namespace Aurora.Design.Views.Party
 
             State(PartyState.SelectingHost);
         }
+
+        ~PartyViewModel()
+        {
+            if (_executor != null)
+            {
+                _executor.Close();
+            }
+        }
+
         #region Properties
 
         public ObservableCollection<PartyMember> Members