Reference local build of RGB.NET

Rewrote UI LED-rendering, performance needs some work

src/Artemis.UI/Extensions/RgbColorExtensions.cs

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+using System;
+using RGB.NET.Core;
+using Color = System.Windows.Media.Color;
+
+namespace Artemis.UI.Extensions
+{
+    public static class RgbColorExtensions
+    {
+        public static Color ToMediaColor(this RGB.NET.Core.Color color)
+        {
+            var (_, r, g, b) = color.GetRGBBytes();
+            return Color.FromRgb(r, g, b);
+        }
+    }
+}

src/Artemis.UI/Extensions/RgbRectangleExtensions.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using RGB.NET.Core;
+
+namespace Artemis.UI.Extensions
+{
+    public static class RgbRectangleExtensions
+    {
+        public static System.Drawing.Rectangle ToDrawingRectangle(this Rectangle rectangle)
+        {
+            return new System.Drawing.Rectangle((int) rectangle.X, (int) rectangle.Y, (int) rectangle.Width, (int) rectangle.Height);
+        }
+    }
+}