Core - Add HidSharp to force plugins to share the HidSharp types

Core - For now, set default log level to debug
ColorGradient- Improved GetColor performance
ColorGradient - GetColor now handles colors not between two stops properly
Home - Fix links
Plugins - Only allow layer property registration through Brushes
Color brush - Default to solid color

src/Artemis.Core/Services/Interfaces/IRgbService.cs

@@ -28,6 +28,8 @@ namespace Artemis.Core.Services.Interfaces
         /// </summary>
         IReadOnlyCollection<IRGBDevice> LoadedDevices { get; }
 
+        TimerUpdateTrigger UpdateTrigger { get; }
+
         /// <summary>
         ///     Adds the given device provider to the <see cref="Surface" />
         /// </summary>