Restructured folders and project names, ci should be fixed

src/NadekoBot/Services/INService.cs

@@ -0,0 +1,20 @@
+using System.Threading.Tasks;
+
+namespace NadekoBot.Core.Services
+{
+    /// <summary>
+    /// All services must implement this interface in order to be auto-discovered by the DI system
+    /// </summary>
+    public interface INService
+    {
+        
+    }
+
+    /// <summary>
+    /// All services which require cleanup after they are unloaded must implement this interface
+    /// </summary>
+    public interface IUnloadableService
+    {
+        Task Unload();
+    }
+}