Ground work for Wino Calendar. (#475)

Wino Calendar abstractions.

Wino.Core.Domain/Interfaces/ISettingsBuilderService.cs

@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+using Wino.Core.Domain.Models.Settings;
+
+namespace Wino.Core.Domain.Interfaces
+{
+    public interface ISettingsBuilderService
+    {
+        List<SettingOption> GetSettingItems();
+    }
+}