Initial split of the modules

NadekoBot.Core/Services/INService.cs

@@ -0,0 +1,10 @@
+namespace NadekoBot.Services
+{
+    /// <summary>
+    /// All services must implement this interface in order to be auto-discovered by the DI system
+    /// </summary>
+    public interface INService
+    {
+        
+    }
+}