Add support for spritesheets

[grilme99]

Like Tarmac, Asphalt should support outputting a sprite sheet of images.

[jackTabsCode]

I'd be interested in hearing more from a user perspective about how you expect this to work!

@grilme99

[RuizuKun-Dev]

Still waiting on this

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I'd be interested in hearing more from a user perspective about how you expect this to work!

@jackTabsCode

I'd expect it to work exactly like Tarmac

[notmagniill]

It's been more than a year now, originally I saw in the README there was planned support. But it was removed so not sure if Asphalt is getting spritesheet support.
I got tired of waiting so...
https://github.com/notmagniill/tungsten
I guess this could serve as a for now replacement?

[jackTabsCode]

@notmagniill Image packing/"spritesheet" support is still planned. It hasn't been top priority for me because I work on a game that has like, 30,000 high res images. As you can imagine, image packing wouldn't serve us much there. I just removed it from the README to clean it up.

[notmagniill]

@jackTabsCode Oh okay, thanks for clarifying!