Big Graphics update

Separated LightManager
Added Sprite class
Added View class
Camera is no longer a SceneNode
Fixed Material not invalidating programs
Renamed CameraPosition uniform to EyePosition
Renamed VisibilityTest to FrustumCull


Former-commit-id: ff7fbe4d9b31a3c269baab0b48c6faa347a12161

src/Nazara/Graphics/AbstractViewer.cpp

@@ -0,0 +1,8 @@
+// Copyright (C) 2013 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Graphics module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Graphics/AbstractViewer.hpp>
+#include <Nazara/Graphics/Debug.hpp>
+
+NzAbstractViewer::~NzAbstractViewer() = default;