Core - Added stores for the different register-able types

Profiles - Refactored large parts of the profile structure to use these stores

src/Artemis.Core/Services/Registration/Interfaces/ILayerEffectService.cs

@@ -0,0 +1,27 @@
+using System.Collections.Generic;
+using Artemis.Core.LayerBrushes;
+using Artemis.Core.LayerEffects;
+
+namespace Artemis.Core.Services
+{
+    /// <summary>
+    ///     A service that allows you to register and retrieve layer brushes
+    /// </summary>
+    public interface ILayerEffectService : IArtemisService
+    {
+        /// <summary>
+        ///     Add an effect descriptor so that it is available to profile elements
+        /// </summary>
+        LayerEffectRegistration RegisterLayerEffect(LayerEffectDescriptor descriptor);
+
+        /// <summary>
+        ///     Remove a previously added layer effect descriptor so that it is no longer available
+        /// </summary>
+        void RemoveLayerEffect(LayerEffectRegistration registration);
+
+        /// <summary>
+        ///     Returns a list of all registered layer effect descriptors
+        /// </summary>
+        List<LayerEffectDescriptor> GetLayerEffects();
+    }
+}