Merge branch 'develop' into window-restyle

Hashing/ObservableObject.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Text;
+
+namespace Util
+{
+    public abstract class ObservableObject : INotifyPropertyChanged
+    {
+        public event PropertyChangedEventHandler PropertyChanged = (sender, e) => { };
+
+        public void OnPropertyChanged(string name)
+        {
+            PropertyChanged(this, new PropertyChangedEventArgs(name));
+        }
+    }
+}