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

include/Nazara/Graphics/Model.hpp

@@ -88,12 +88,12 @@ class NAZARA_API NzModel : public NzSceneNode, public NzUpdatable
 		NzModel& operator=(NzModel&& node);
 
 	private:
+		bool FrustumCull(const NzFrustumf& frustum) override;
 		void Invalidate() override;
 		void Register() override;
 		void Unregister() override;
 		void Update() override;
 		void UpdateBoundingVolume() const;
-		bool VisibilityTest(const NzCamera* camera) override;
 
 		std::vector<NzMaterialRef> m_materials;
 		NzAnimationRef m_animation;