Add and enable SteamWorks GS Detours (+CDetour).

Extension/swgsdetours.h

@@ -0,0 +1,35 @@
+/*
+    This file is part of SourcePawn SteamWorks.
+
+    SourcePawn SteamWorks is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    SourcePawn SteamWorks is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with SourcePawn SteamWorks.  If not, see <http://www.gnu.org/licenses/>.
+	
+	Author: Kyle Sanderson (KyleS).
+*/
+
+#pragma once
+#include "smsdk_ext.h"
+#include "steam_gameserver.h"
+#include "CDetour/detours.h"
+
+class SteamWorksGSDetours
+{
+	public:
+		SteamWorksGSDetours();
+		~SteamWorksGSDetours();
+		
+	private:
+		CDetour *m_pShutdownDetour;
+};
+
+#include "extension.h"