ModelParameters no longer contains shaderName field

Instead it will now set the shaderName field of the material field to
PhongLighting


Former-commit-id: 55b7f5500c7dc2c147f32a7c214a8e75ea434ff1

include/Nazara/Graphics/Model.hpp

@@ -17,12 +17,13 @@
 
 struct NAZARA_API NzModelParameters
 {
+	NzModelParameters();
+
 	bool loadAnimation = true;
 	bool loadMaterials = true;
 	NzAnimationParams animation;
 	NzMaterialParams material;
 	NzMeshParams mesh;
-	NzString shaderName = "PhongLighting";
 
 	bool IsValid() const;
 };