Add GPL modules

MediaBrowser.Controller/Plugins/IServerEntryPoint.cs

@@ -0,0 +1,20 @@
+using System;
+
+namespace MediaBrowser.Controller.Plugins
+{
+    /// <summary>
+    /// Interface IServerEntryPoint
+    /// </summary>
+    public interface IServerEntryPoint : IDisposable
+    {
+        /// <summary>
+        /// Runs this instance.
+        /// </summary>
+        void Run();
+    }
+
+    public interface IRunBeforeStartup
+    {
+
+    }
+}