Release 2.5.0 - Image-based tilesets & object layers

[megamarc]

Version 2.5.0 adds the ability to use image-based tilesets and use them on object layers. It is now possible to edit an object layer containing images in Tiled, and render it in Tilengine without having to define them at runtime like in release 2.4.0. It is also possible to iterate the objects contained in the layer from the application, to integrate them into the gameplay and not have to use an alternative reader. The "forest" example has been updated to show this new feature, and some bugs have been fixed.

GitHub project and itch.io packages have been updated.