Finish chat/players functionality, refactor logic to non-static classes with a single static entry point, add data binding

Piston/MTObservableCollection.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Threading;
+
+namespace Piston
+{
+    public class MTObservableCollection<T> : ObservableCollection<T>
+    {
+        public override event NotifyCollectionChangedEventHandler CollectionChanged;
+        protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
+        {
+            NotifyCollectionChangedEventHandler collectionChanged = CollectionChanged;
+            if (collectionChanged != null)
+                foreach (NotifyCollectionChangedEventHandler nh in collectionChanged.GetInvocationList())
+                {
+                    var dispObj = nh.Target as DispatcherObject;
+
+                    Dispatcher dispatcher = dispObj?.Dispatcher;
+                    if (dispatcher != null && !dispatcher.CheckAccess())
+                    {
+                        dispatcher.BeginInvoke(
+                            (Action)(() => nh.Invoke(this,
+                                                     new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset))),
+                            DispatcherPriority.DataBind);
+                        continue;
+                    }
+
+                    nh.Invoke(this, e);
+                }
+        }
+    }
+}