Make mesh able to carry material informations

- Move OBJ Loader to Utility module, where it belongs
- Change Mesh material informations from a path to a parameterlist
- Improve Mesh code


Former-commit-id: f16f48f8b6399188a09797cec3707ab6726bdbca

include/Nazara/Renderer/TextureSampler.hpp

@@ -9,7 +9,7 @@
 
 #include <Nazara/Prerequesites.hpp>
 #include <Nazara/Renderer/Config.hpp>
-#include <Nazara/Renderer/Enums.hpp>
+#include <Nazara/Utility/Enums.hpp>
 
 namespace Nz
 {