Implemented most of the rendering pipeline in SkiaSharp

src/Artemis.Plugins.LayerTypes.Brush/BrushLayerElementSettings.cs

@@ -1,9 +1,16 @@
-using Artemis.Core.Plugins.LayerElement;
+using System.Collections.Generic;
+using Artemis.Core.Plugins.LayerElement;
+using SkiaSharp;
 
 namespace Artemis.Plugins.LayerElements.Brush
 {
     public class BrushLayerElementSettings : LayerElementSettings
     {
-        public System.Drawing.Brush Brush { get; set; }
+        public BrushLayerElementSettings()
+        {
+            Colors = new List<SKColor>();
+        }
+
+        public List<SKColor> Colors { get; set; }
     }
 }