Add an example with real images

[alexmozaidze]

I can't figure out how to add images to atlas

[ChevyRay]

This isn't an image packer, it's a rectangle packer, so it won't provide you the tools to actually pack images.

But I updated the pack_images example to show image loading as an example using the image crate.

• 66a7d94

[alexmozaidze]

Thank you, this helped a lot!