Added Reset method to Property.

Author: EggAllocationService

UnityMapper/API/Properties.cs

@@ -40,6 +40,16 @@ int GetVectorLength()
     /// <returns>An object of the same type returned by <see cref="GetMappedType"/>. If the type is different, an exception will be thrown.</returns>
     object GetValue();
 
+    /// <summary>
+    /// Called by UnityMapper to reset the property to a default state.
+    ///
+    /// This is called usually when an instance is released.
+    /// </summary>
+    void Reset()
+    {
+        
+    }
+
     /// <summary>
     /// Used to name the corresponding signal in the libmapper graph. 
     /// </summary>