Refactor the way resources are loaded (#191)

* WIP

* WIP

* Font works

* WIP: Only Music remains

* Looks like it's working

* Fix oopsie

* Core/ObjectRef: Add cast functions

* Update ChangeLog.md

* Audio/SoundStream: Make sound stream thread-safe

src/Nazara/Utility/Formats/OBJLoader.cpp

@@ -153,7 +153,7 @@ namespace Nz
 			return true;
 		}
 
-		bool Load(Mesh* mesh, Stream& stream, const MeshParams& parameters)
+		MeshRef Load(Stream& stream, const MeshParams& parameters)
 		{
 			long long reservedVertexCount;
 			if (!parameters.custom.GetIntegerParameter("NativeOBJLoader_VertexCount", &reservedVertexCount))
@@ -163,9 +163,10 @@ namespace Nz
 			if (!parser.Parse(stream, reservedVertexCount))
 			{
 				NazaraError("OBJ parser failed");
-				return false;
+				return nullptr;
 			}
 
+			MeshRef mesh = Mesh::New();
 			mesh->CreateStatic();
 
 			const String* materials = parser.GetMaterials();
@@ -341,7 +342,7 @@ namespace Nz
 				ParseMTL(mesh, stream.GetDirectory() + mtlLib, materials, meshes, meshCount);
 			}
 
-			return true;
+			return mesh;
 		}
 	}