Custom Fps Limiter

First time contributing. Set FPS limit on second page of graphics
settings. Press Tab key or on 360 controller, press left stick to toggle
between 3 states.

Windows/WndMainWindow.cpp

@@ -185,6 +185,10 @@ namespace MainWindow
 		g_Config.iTexScalingType = num;
 		if(gpu) gpu->ClearCacheNextFrame();
 	}
+	void setFpsLimit(int fps) {
+		g_Config.iFpsLimit = fps;
+		if(gpu) gpu->ClearCacheNextFrame();
+	}
 
 	BOOL Show(HINSTANCE hInstance, int nCmdShow)
 	{