Support for third party modules, improved error handling, standardardized enum naming, reorganized interface definitions, support for DB script upgrades, added Settings entity

Oqtane.Client/Services/Interfaces/ISiteService.cs

@@ -0,0 +1,19 @@
+using Oqtane.Models;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Oqtane.Services
+{
+    public interface ISiteService
+    {
+        Task<List<Site>> GetSitesAsync();
+
+        Task<Site> GetSiteAsync(int SiteId);
+
+        Task<Site> AddSiteAsync(Site Site);
+
+        Task<Site> UpdateSiteAsync(Site Site);
+
+        Task DeleteSiteAsync(int SiteId);
+    }
+}