Add "Q" / "E" as freelook keybindings

To move the view up and down.

Source/Core/VideoCommon/Src/VertexShaderManager.h

@@ -32,7 +32,7 @@ public:
 	static void SetProjectionChanged();
 	static void SetMaterialColorChanged(int index);
 
-	static void TranslateView(float x, float y);
+	static void TranslateView(float x, float y, float z = 0.0f);
 	static void RotateView(float x, float y);
 	static void ResetView();
 };