Put Plugins/ in Core/, rename to VideoBackends

Source/Core/VideoBackends/OGL/Src/stdafx.h

@@ -0,0 +1,12 @@
+// Copyright 2013 Dolphin Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#pragma once
+#define _WIN32_WINNT 0x501
+#ifndef _WIN32_IE
+#define _WIN32_IE 0x0500       // Default value is 0x0400
+#endif
+
+#include <tchar.h>
+#include <windows.h>