Implemented layer elements

Added a brush layer element
Corsair - Added ST100 RGB layout

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

@@ -0,0 +1,9 @@
+using Artemis.Core.Plugins.LayerElement;
+
+namespace Artemis.Plugins.LayerElements.Brush
+{
+    public class BrushLayerElementSettings : LayerElementSettings
+    {
+        public System.Drawing.Brush Brush { get; set; }
+    }
+}