Core - Added ways for the core to easily access brush properties

%*/@ me, dealing with generic types in APIs is tricky

src/Artemis.Core/Plugins/LayerBrush/BaseLayerBrush.cs

@@ -1,5 +1,7 @@
 using System;
+using System.Collections.Generic;
 using Artemis.Core.Models.Profile;
+using Artemis.Core.Models.Profile.LayerProperties;
 using Artemis.Core.Plugins.Models;
 using Artemis.Core.Services.Interfaces;
 using SkiaSharp;
@@ -66,5 +68,14 @@ namespace Artemis.Core.Plugins.LayerBrush
         internal virtual void UpdateProperties(double deltaTime)
         {
         }
+
+        internal virtual void OverrideProperties(TimeSpan overrideTime)
+        {
+        }
+
+        internal virtual IReadOnlyCollection<BaseLayerProperty> GetAllLayerProperties()
+        {
+            return new List<BaseLayerProperty>();
+        }
     }
 }

src/Artemis.Core/Plugins/LayerBrush/LayerBrush.cs

@@ -1,4 +1,7 @@
-using Artemis.Core.Models.Profile;
+using System;
+using System.Collections.Generic;
+using Artemis.Core.Models.Profile;
+using Artemis.Core.Models.Profile.LayerProperties;
 using Artemis.Core.Plugins.Exceptions;
 using Artemis.Core.Services.Interfaces;
 
@@ -60,6 +63,16 @@ namespace Artemis.Core.Plugins.LayerBrush
             Properties.Update(deltaTime);
         }
 
+        internal override void OverrideProperties(TimeSpan overrideTime)
+        {
+            Properties.Override(overrideTime);
+        }
+
+        internal override IReadOnlyCollection<BaseLayerProperty> GetAllLayerProperties()
+        {
+            return Properties.GetAllLayerProperties();
+        }
+
         #endregion
     }
 }