Profile editor - Started implementing property add/remove handling

src/Artemis.UI/Screens/Module/ProfileEditor/LayerProperties/Timeline/PropertyTimelineViewModel.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using Artemis.Core.Models.Profile.LayerProperties;
 using Artemis.UI.Ninject.Factories;
 using Artemis.UI.Services.Interfaces;
 using Stylet;
@@ -60,6 +61,11 @@ namespace Artemis.UI.Screens.Module.ProfileEditor.LayerProperties.Timeline
                 CreateViewModels(child);
         }
 
+        public void AddLayerProperty(BaseLayerProperty layerProperty)
+        {
+            throw new NotImplementedException();
+        }
+
         public void ClearProperties()
         {
             PropertyTrackViewModels.Clear();