Big UberShader update

-Added GRAPHICS_MAX_LIGHTPERPASS macro
-Added glGetActiveUniform OpenGL function
-Added (Uber)ShaderLibrary
-Added (Uber)ShaderName parameter to models
-Changed uniform system
-Fixed Node copying
-Moved Material class to Graphics module
-Optimized lights
-Remade Shader class
-Renamed Node::Invalidate to Node::InvalidateNode
-Renamed ShaderProgram to Shader


Former-commit-id: 15f0cad52969e91a2442e7d750ba2dc412f3549d

src/Nazara/Graphics/Scene.cpp

@@ -48,13 +48,6 @@ NzScene::NzScene()
 
 NzScene::~NzScene()
 {
-	const std::vector<NzNode*>& childs = m_impl->root.GetChilds();
-	for (NzNode* child : childs)
-	{
-		if (child->GetNodeType() == nzNodeType_Scene)
-			static_cast<NzSceneNode*>(child)->SetScene(nullptr);
-	}
-
 	delete m_impl;
 }